NUMBER XLIX. (No. 49. January 1852.)

I. Notes on the Diatomaceæ ; with descriptions of British species included in the genus Pleurosigma . By the Rev. Wm. SMITH, F.L.S. (With two Plates.) page 1.
11. Notice of a new British Viola . By CHARLES C. BABINGTON, M.A., F.R.S Page 12.
III. A Catalogue of British Spiders, including remarks on their Structure, Functions, Œconomy, and Systematic Arrangement. By JOHN BLACKWALL, F.L.S. page 15.
IV. Upon the Development of Mollusks in Holothuriæ . By Prof. Müller. Page 22.
V. Notes on Chalcidites , and descriptions of various new species. By FRANCIS WALKER, F.L.S. Page 39
VI. Descriptions of some Hymenopterous Insects captured in India , with notes on their Œconomy. By FREDERICK SMITH, Assistant Zoological Department, British Museum . Page 44

New Books:- A Naturalist's Sojourn in Jamaica , by P. H. Gosse.- Man and his Migrations, by R. G. Latham, M.D., F.R.S. &c.- The Ethnology of the British Colonies and Dependencies, by R. G. Latham, Esq., M.D. &c.-Revue des Odonates ou Libellules d'Europe, par Edm. de Selys-Longchamps. Avec la collaborationde M. le Docteur Hagen Pages 50-57

Proceedings of the Zoological Society; Botanical Society of Edin­burgh . Pages 58-73

Notice of the Occurrence of the Black Tern, Sterna nigra , Linn., near Coldstream, by John Alexander Smith, M.D. ; On the Circulation of the Blood, and Nutrition in Insects, by M. Emile Blanchard. On the Occurrence of Eolis Landsburgii , by the Rev. T. Hincks, B.A .; Discovery of the Remains of several Orders of Reptiles in the Old Red Sandstone and Shales of Scotland; Notes on the Habits of the Crustacea of the Antilles, by Dr. P. Duchassaing of Panama; Obituary- Mr. Samuel Veall; Meteorological Observa­tions and Table. Pages 73-80

NUMBER L. (No. 50. February 1852.)

VII. On the Cassidulidæ of the Oolites, with descriptions of some new species of that family. By THOMAS WRIGHT, M.D. &c. (With two Plates.) Page 81
VIII. Upon the Production of Mollusks in Holothuriæ . By Prof. MÜLLER. Page103
IX. Brief Diagnostic Notices of new Maderan Land Shells. By R. T. LOWE, M.A. Page 112
X. On the probable Dimensions of Carcharodon Megalodon from the Crag. By J. S. BOWERBANK, F.R.S., L.S. &c. Page 120
XI. Descriptions of Rubi . By CHARLES C. BABINGTON, M.A., F.R.S. &c. Page 123
XII. Observations on the Affinities of the Olacaceæ . By JOHN MIERS, Esq., F.R.S., F.L.S. Page 128

New Books :- Narrative of the Voyage of H.M.S. Rattlesnake, during the years 1846-50, by John MacGillivray, F.R.G. S., Naturalist to the Expedition.-The Geology and Fossils of the Tertiary and Cretaceous Formations of Sussex, by Frederick Dixon, F.G.S.- A Popular History of British Ferns and the allied Plants, by T. Moore, F.L.S. &c. Pages 132-141

Proceedings of the Zoological Society; Botanical Society of Edin­burgh . Pages 142-152

Observations on the genus Acostaæ of D'Orbigny, by J. E. Gray, F.R.S., V.P.Z.S. &c.; Notice of the Sea Bream, Pagellus centrodontus , Cuv., taken in the Firth of Forth, by John Alexander Smith, M.D.; On the Circulation and Respiration of the Annelida, by M. A. de Quatrefages; On the Organ of Smell in the Fluviatile and Terrestrial Gasteropodous Mollusca, by M. Moquin­Tandon; Monstrosity in the Petals of Houkeneja peploides , by Charles C. Babington, M.A.; On Anus glacialis , by William Thompson ; Mollusca dredged in Cork Harbour during the Sum­mer of 1851, by Samuel Wright and J. Carroll; On the General Cavityof the Body of Invertebrate Animals, by M. A. de Quatrefages; Early Flowers; Dr. Grant, F.R.S.; Meteorological Obser­vations and Table. Pages 152-160

NUMBER LI. (No. 51. March 1852.)

XII. On the Gangetic Dolphin. By DAN. FRED. ESCHRICHT, Professor at the University of Copenhagen . From the Danish by Dr. WALLICH, F.R.S. (With three Plates.) Page 161
XIV. Observations on the Olfactory Apparatus in the Bullidæ . By ALBANY HANCOCK, Esq. Page 188
XV. On a new British species of Lepton . By WILLIAM CLARK, Esq. Page 191
XVI. Enumeration of some Fungi from St. Domingo. By the Rev. M. J. BERKELEY, M.A., F.L.S. (With a Plate.) Page 192
XVII. Descriptions of two new British genera of Insects, and of two new species, belonging to the family Curculionidæ . By JOHN WALTON, F.L.S. Page 204
XVIII. On the Cassidulidæ of the Oolites, with descriptions of some new species of that family. By THOMAS WRIGHT, M.D. &c. Page 206
XIX. Observations on Professor Loven's Homologies of Mollusca. By J. E. GRAY, F.R.S., V.P.Z.S. &c. Page 215
XX. Observations on the Affinities of the Icacinaceæ . By JOHN MIERS, Esq., F.R.S., F.L.S. Page 218

New Books :-The British species of Angiocarpous Lichens , elucidated by their Sporidia, by the Rev. W. A. Leighton, B.A.- Nereis Boreali-Americana; or Contributions towards a History of the Marine Algæ of the Atlantic and Pacific Coasts of North America, by William Henry Harvey, M.D., M.R.I.A. &c. Part I. Melanospermeæ . Pages 226-231

Proceedings of the Zoological Society; Botanical Society of Edin­burgh . Pages 231-240

Note on a Monstrosity observed in the Cockchafer ( Melolontha vulgaris ), by M. Lereboullet, M.D.; Description of a new species of Macgillivrayia , by A. Adams, F.L.S.; On the Anatomy and Phy­siology of Salpa and Pyrosoma , by Thomas H. Huxley, F.R.S.; Larus glaucus , by William Thompson ; Algæ taken in Cork Har­bour or along the coast during the Summers of 1850 and 1851, by J. Carroll; Anatomical Observations on the Dasyurus ( Sarcophilus ) ursinus , by M. W. Vrolik; On the Nervous System of Insects, by M. Dujardin; Obituary- William Thompson, F.L.S. &c. ;Meteorological Observations and Table. Pages 240-248

NUMBER LII. (No. 52. April 1852.)

XXI. Notes and Descriptions of a few Brachiopoda; including a Monograph of the French Liasic Spirifers. By THOMAS DAVIDSON, Member of the Geol. Soc. of France , &c. (With three Plates.) Page 249
XXII. A Catalogue of British Spiders, including remarks on their Structure, Functions, Œconomy, and Systematic Arrangement. By JOHN BLACKWALL, F.L.S. Page 268
XX III. Brief Diagnostic Notices of new Maderan Land Shells. By the Rev. R. T. LOWE, M.A. Page 275
XXIV. On the Gangetic Dolphin. By DAN. FRED. ESCHRICHT, Professor at the University of Copenhagen . From the Danish by Dr. WALLICH, F.R.S. Page 279
XXV. Further Observations on Lepton Clarkiæ . By WILLIAM CLARK, Esq. Page 293
XXVI. On the Cassidulidæ of the Oolites, with descriptions of some new species of that family. By THOMAS WRIGHT, M.D. &c. Page 294
XXVII. Notices of British Fungi. By the Rev. M. J. BERKELEY, M.A., F.L.S., and C. E. BROOME, Esq. (With four Plates.) Page 317
XXVIII. Rambles in Ceylon . By E. L. LAYARD. Page 329

New Books :- Prodromus Floræ Batavæ . Vol. I. Plantæ Vasculares. In sociorum imprimis usum edendum curavit Societas promovendo Florae Bataviæ studio. Page 340

Proceedings of the Zoological Society; Botanical Society of Edinburgh . Pages 342-354

On a new genus of Chitonidæ , by Henry and Arthur Adams; On the Appearance of large Swarms of Butterflies, by M. Ghiliani; Rare Irish Mollusca, by William White Walpole; On the Insects inju­rious to the Rape Crops, by M. Ad. Focillon; Note on a species of Coccus, indigenous to France, which lives on the Common Bean, and appears to be capable of furnishing an abundant Colour­ing Matter which may be used in the Arts, by M. Guérin-Méneville; Obituary-H. N. Turner, Jun.; Meteorological Observa­tions and Table. Pages 355-360

NUMBER LIII. (No. 53. May 1852.)

XXIX. Sketch of a Classification of Recent Brachiopoda; based upon Internal Organization. By THOMAS DAVIDSON, Member of the Geol. Soc. of France , &c. Page 361
XXX. Notices of British Fungi. By the Rev. M. J. BERKELEY, M.A., F.L.S., and C. E. BROOMS, Esq. (With four Plates.) Page 377
XXXI On some genera of the Icacinaceæ . By JOHN MIERS, Esq., F.R.S., F.L.S. Page 387
XXXII. On the Venus undata of authors. By WILLIAM CLARK, Esq. Page 400
XXXIII. Notes on some Scotch Zoophytes and Polyzoa. By WYVILLE T. C. THOMSON, Sec. R.P.S., F.B.S.E., Lecturer on Bo­tany, King's College, Aberdeen . (With a Plate.) Page 403
XXXIV. Characters of new species of Helix from Southern India and Bengal . By W. H. BENSON, Esq. Page 404
XXXV. Observations on Hyperoodon latifrons . By J. E. GRAY, Ph.D.., F.R.S., V.P.Z.S. &c. Page 407

New Books :- The Vegetation of Europe , its Conditions and Causes, by A. Henfrey, F.L.S.- Conspectus Cyclostomaceorum emendatus et auctus Pneumonopomorum Monographiæ Prodromus, auctore Dr. Ludovico Pfeiffer. Pages 411-413

Proceedings of the Zoological Society; Cork Cuvierian Society. Pages 413-434

Notice of a twin Mushroom, by Mr. Anderson (with a Plate) ; On the Circulation of the Blood in Insects, by M. Leon Dufour; On the Transmigration of Worms, by Charles Vogt; Meteorological Observations and Table. Pages 435-440

NUMBER LIV. (No. 54. June 1852.)

XXXVI. On the Reproduction of the Higher Cryptogamia and the Phanerogamia. By ARTHUR HENFREY, F.L.S. &c. (With a Plate.) Page 441
XXXVII. Upon the Mode of Generation of an Hymenopterous Insect of the family of the Pteromalidæ . By Dr. PH. DE FILIPPI, Professor of Zoology at Turin . (With a Plate.) Page 461
XXXVIII. A Catalogue of British Spiders, including remarks on their Structure, Functions, Œconomy, and Systematic Arrangement. By JOHN BLACKWALL, F.L.S. Page 464
XXXIX Contributions to the History of the Development and to the Minute Anatomy of the Infusoria. By Prof. STEIN Of Tharand. (With a Plate.) Page 471
XL. On some genera of the Icacinaceæ . By JOHN MIERS, Esq., F.R.S., F.L.S. Page 481
XLI. Note upon the Male of the Argonaut and the Hectocotylus . By Dr. HENRY MÜLLER of Wurzburg . Page 492
XLII. On the Ergot of Rye , Sclerotium Clavus , D.C. By M. L. R. TULASNE. Page 494

New Books :- Class Book of Botany ; being an Introduction to the Study of the Vegetable Kingdom, by J. H. Balfour, M.D. &c., and Professor of Botany in the University of Edinburgh. Part I. Struc­tural and Morphological Botany. Page 497

Proceedings of the Zoological Society; Botanical Society of Edin­burgh ; Royal Institution. Pages 498-509

The Collared Snake, Coluber natrix ; Note on the most important Result of the Sericicultural Experiments made with the assistance of M. Eugéne Robert at the Experimental Silkworm Establishment at Sainte-Tulle, by M. Guérin-Méneville; On the Petrifaction of Organized Bodies (especially Shells) in the existing Seas, by M. Marcel de Serres; Additions and Corrections to Mr. Davidson's paper on some Brachiopoda ; Meteorological Observations and Table. Pages 509-515. Index. Page 516.

NUMBER LV. (No. 55. July 1852)

I. On the Nervous System of 0mmastrephes todarus. By ALBANY HANCOCK, Esq. (with two Plates.) Page 1
II. A few Notes on the Structure of the Belemnite. By GIDEON ALGERNON MANTELL, Esq., LL.D., F.R.S., President of the West London Medical Society, &c. Page 14
III. On a supposed new species of Eleocharis . By CHARLES C. BABINGTON, M.A., F.R.S. &c. Page 19
IV. On some of the rarer British Gasteropodous Mollusca. By WILLIAM CLARK, Esq. Page 22
V On the Skeleton of the Great Chimpanzee, Troglodytes gorilla . By S. KNEELAND, Jun., M.D., Boston , U.S.A. Page 23
VI. On some genera of the Icacinaceæ . By JOHN MIERS, Esq., F.R.S., F.L.S. Page 30
VII. Notes on Chalcidites , and descriptions of various new species. By FRANCIS WALKER, F.L.S. Page 45

Proceedings of the Zoological Society; Royal Institution of Great Britain ; Botanical Society of Edinburgh ; Linnaean Society. Pages 49-68

Ornithological Notes, by John Alexander Smith, M D; Corfiote Shells, by Sylvanus Hanley, Esq.; On Littorina palliata , by William Thompson ; New Locality for Tulostoma mammosum , by Matthew Moggridge; On the Preservation of the Fecundated Eggs of Fishes, by M. Coste; Postscript to Mr. Clark's Paper on Rare British Mollusca; Irish Mollusca, by William White Walpole ; On the Sun Column as seen at Sandwick Manse, Orkney, in April 1352, by C. Clouston ; Meteorological Observations and Table. Pages 69-8O

NUMBER LVI. (No. 56. August 1852.)

VIII. Notes on the Reproduction of the Campanulariadæ ; with a description of a new species of Laomedea . By the Rev. THOMAS HINCKS, B.A. (With a Plate.) Page 81
IX. Contributions to the Palæontology of the Isle of Wight . By THOMAS WRIGHT, M.D. &c. Page 87
X. Descriptions of some newly discovered species of Araneidea . By JOHN BLACKWALL, F.L.S. Page 93
XI. Note of the Mollusca observed during a short visit to the Canary and Madeira Islands , &c., in the months of April and May 1852. By R. M`ANDREW, F.L.S. Page 100
XII. On some genera of the Icacinaceæ . By JOHN MIERS, Esq., F.R.S., F.L.S. Page 108
XIII. Upon the Genus Doliolum and its species. By Dr. A. KROHN. (With a Plate.) Page 119
XIV. On the genus Lepton. By WILLIAM CLARK, Esq. Page 129

New Books :- A History of Infusorial Animalcules, Living and Fossil, by Andrew Pritchard, M.R.I.-A Synopsis of the Family Of Naiades , by Isaac Lea. Pages 134-138

Proceedings of the Zoological Society. Page 138

Observations on the Circulation of the Blood in the Arachnida , by M. Emile Blanchard; On the Distribution of Coluber natrix , by John Henry Gurney; Uses of the Stillingia sebifera, or Tallow Tree, with a notice of the Pe-la , an Insect-wax of China, by J. D. Macgowan, M.D.; Nymphæa alba var.. major , by J. De C. Sowerby ; On the Structure of the Belemnite; Meteorological Observations and Table. Pages 150-160

NUMBER LVII. (No. 57 September 1852.)

XV. On the Form and Structure of the Shell of Operculina Arabica . By H. J. CARTER, Esq., Assistant Surgeon, Bombay Establishment. (With a Plate.) Page 161
XVI. On some genera of the Icacinaceæ . By JOHN MIERs, Esq., F.R.S., F.L.S. Page 176
XVII. A Catalogue of British Spiders, including remarks on their Structure, Functions, Œconomy, and Systematic Arrangement. By JOHN BLACKWALL, F.L.S. Page 142
XVIII. Contributions to British Palæontology :-Some new Lower Palæozoic Mollusca. By F. M`COY, Professor of Geology and Mine­ralogy in Queen's College, Belfast . Page 189
XIX. On some of the Animals of the Chemnitziæ which have not been described. By WILLIAM CLARK, Esq. Page 195
XX. On the Sloughing of the Spider-Crab (Maia Sqainado). By P. H. GOSSE, A.L.S. Page 210

New Books :- Plantæ Javanicæ Rariores, descriptæ Iconibusque illustratre, quas in Insula Java, annis 1802-18, legit et investigavit Thomas Horsfield, M.D.; e siccis Descriptiones et Characteres plurimarum elaboravit Joannes J. Bennett; Observationes Structuram et Affinitates præsertim respicientes passim adjecit Robertus Brown. Pages 213

Proceedings of the Linnæan Society; Royal Society; Botanical So­ciety of Edinburgh . Pages 216-237

Notice of the Occurrence, on the Durham Coast , of Diphyllidia lineata , by Albany Hancock, Esq.; Irish Mollusca, by W. W. Walpole; On the Irritability of the Leaves of Drosera rotundifolia , by Dr. Milde; Embryogeny of Orchis, Gesneria , and other Phanerogamia; Meteorological Observations and Table. Pages 237-240

NUMBER LVIII. (No. 58. October 1852.)

XXI. Observations on the Nidification of Gasterosteus aceleatus and Gasterosteus spinachia . By ALBANY HANCOCK, Esq. Page 241
XXII. A Catalogue of British Spiders, including remarks on their Structure, Functions, (Economy, and Systematic Arrangement. By JOHN BLACKWALL, F.L.S. Page 248
XXIII. On some undescribed Animals of the British Rissoæ. By WILLIAM CLARK, Esq. Page 254
XXIV. On keeping Marine Animals and Plants alive in unchanged Sea-Water. By P. II. GOSSE, A.L.S. Page 263
XXV. Notes on the Genus Cyclostoma ; and Characters of some new species from India , Borneo , and Natal . By W. H. BENSON, Esq. Page 268
XXVI. Observations on the Natural History of the Water-Snail and Fish kept in a confined and limited portion of Water. By ROBERT WARINGTON, Esq. Page 273
XXVII. Description of a new species of Wart Pig from the Camaroons. By J. E. GRAY, Ph.D.., F.R.S., V.P.Z.S. Page 280
XXVIII. Description of Sauresia , a new genus of Scincidæ from St. Domingo. By J. E. GRAY, Ph.D.., F.R.S., V.P.Z.S. Page 281
XXIX. Some Account of a Dredging Expedition on the coast of the Isle of Man during the months of May, June, July and August 1852. By T. C. EYTON, Esq., F.L.S., F.Z.S. Page 282

Proceedings of the Linnæan Society; Zoological Society. Page 285-309

On a Parasite which is developed under exceptional circumstances on the surface of certain alimentary substances and causes them to appear covered with blood, by M. Montague; Irish Mollusca, by W. W. Walpole; Directions for Making and Preserving Microscopical Preparations, by M. Harting; Arenaria serpyllifolia, by Samuel Octavus Gray; Note of the Observation of Cilia in Grantia , by William Hurray Dobie, M.D.; Experimental Re­searches upon the Process of Fecundation in Mosses, by M. H. Philibert; Meteorological Observations and Table. Pages 309-320

NUMBER LIX. (No. 59. November 1852.)

XXX. On a new Genus of the Family of Volvocineæ . By Dr. FERDINAND COHN of Breslau. (With a Plate.) Page 321
XXXI. Notice of an Australian Diplommatina ; and Characters of new East Indian Helicidæ from Darjiling and Sincapore. By W. H. BENSON, Esq. Page 348
XXXII. On the Priority of the Term Polyzoa for the Ascidian Polypes. By GEORGE BUSK, F.R.S. &e. Page 352
XXXIII. Note on a new species of Clionites . By N. T. WETHERELL, Esq., F.G.S., M.R.C.S. &e. (With a Plate.) Page 354
XXXIV. Description of a species of Belemnite , with Observations on Aptychus . By J. MORRIS, F.G.S. (With a Plate.) Page 355
XXXV. On some Crustacea dredged by Mr. Barlee in the Shetlands. By C. SPENCE BATE, Esq. (With a Plate.) Plate 356
XXXVI. On a new Arrangement of British Rissoæ . By H. and A. ADAMS. Page 358
XXXVII. Description of a new Hemipterous Insect forming the type of a new genus. By W. S. DALLAS, Esq., F.L.S. &c. (With a Plate.) Page 359

New Books :- The Natural History of Animals, by Thomas Rymer Jones, F.R.S.- Parks and Pleasure-Grounds, or Practical Notes on Country Residences, Villas, Public Parks and Gardens, by Charles H. J. Smith.- Revue et Magasin de Zoolugie, par M. F. E. Guérin-Méneville. Pages 362-366

Proceedings of the Zoological Society. Page 366

The Natural-History Collections at the British Museum; On the Ni­dification of the Stickleback, by AIbany Hancock; Fossil Pachydermata in Canada, by Thomas Cottle; Remarks on the Mode of Vegetation of European and North American Trees transported to Madeira, by Prof. Oswald Heer; Colymbus septentrionalis , by Matthew Moggridge; On the Structure of the Stem of Victoria Regia , by Arthur Henfrey, F.R.S., F.L.S. &c.; Meteorological Observations and Table. Pages 392-400

NUMBER LX. (No. 60. December 1852.)

XXXVIII. On a new Genus of the Family of Volvocineæ . By Dr. FERDINAND COHN of Breslau . (With a Plate.) 401
XXXIX. On the Tongues of Mollusca. By J. E. GRAY, Ph.D., F.R.S., V.P.Z.S. &c. Page 411
XL. Description of Carterodon sulcidens , Lund . By JOHN HARDT. Translated from the Danish by Dr. WALLICH, F.R.S., Vice­Pres. L.S. Page 417
XLI. Contributions to British Palæontology :- On some new Bra­chiopoda from the Carboniferous Limestone. By FREDERICK M`COY, Professor of Mineralogy and Geology in Queen's College, Belfast . Page 421
XLII. On a species of Strombus in the Hunterian Museum at Glasgow . By THOMAS GRAY, Esq., Glasgow . Page 429
XLIII. Experiments on the Transformation of the Cystoid Worms into Tænias. By C. T. VON SIEBOLD. Page 431
XLIV. Some Account of a Dredging Expedition off the coast of the Isle of Man during the months of May, June, July and August 1852. By T. C. EYTON, Esq., F.L.S., F.Z.S. Page 434
XLV. Further Note on Atelides centrolineatus . By W. S. DALLAS, F.L.S. Page 436
XLVI. Descriptions of several new Genera of Reptiles, principally from the Collection of H.M.S. Herald. By J. E. GRAY, Esq., Ph.D., F.R.S., V.P.Z.S. &e. Page 437

New Books :- Revue et Magasin de Zoologie, par M. F. E. Guérin­ Méneville. Page 440

Proceedings of the Zoological Society; Royal Society; Linnaean Society. Pages 444-463

On a Venomous Fly of Southern Africa, by MM. W.Oswelland Arnaud ; Experimental Researches upon the Temperature of Reptiles, and on the modifications which it undergoes under various circum­stances, by M. Aug. Duméril; Late appearance of the Swallow, by G. Bryant; Meteorological Observations and Table. Pages 463-466. Index 467

PLATES IN VOL. X. PLATE I. & II. } Nervous System of Ommastrephes todarus. III. Reproduction of the Campannlariadæ.- Structure of Doliolum. IV. Form and Structure of the Shell of Operculina Arabica. V. New species of Clionites.- New species of Belemnite.-Hippo­lyte Barleei.- Atelides centrolineatus. VI. Structure and Development of Stephanosphæra, a new genus of the Volvocineæ. ERRATUM. Page 351, line 11 from top, for 1844 read 1849.