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I.—Notice of the Life and Labours of DeCandolle: extracted [and translated] from the Address delivered before the Royal Botanical Society of Ratisbon, at its metting on the 28th of November 1841, by the President Prof. von Martius
Volume 12, Page 1
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II.—Observations on some Points in the Anatomy and Physiology of the Freshwater Algæ
Volume 12, Page 20
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III.—The Birds of Ireland
Volume 12, Page 31
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VI.—Characters of several new Species of Brazilian Mammalia
Volume 12, Page 42
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Descriptions of Chalcidites discovered by C. Darwin, Esq
Volume 12, Page 45
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Descriptions of Chalcidites discovered in St. Vincent's Isle by the Rev. Lansdown Guilding
Volume 12, Page 46
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Bibliographical Notices
Volume 12, Page 49
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Proceedings of Learned Societies
Volume 12, Page 52
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Miscellaneous
Volume 12, Page 74
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X.—Observations on a Disease, the production of a Fungus, occurring in the Lettuce and other Vegetables
Volume 12, Page 86
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XI.—On two new species of British Jungermasnniæ
Volume 12, Page 88
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XII.—List of Birds obtained in the vicinity of Calcutta, from September 1841 to March 1843 inclusive
Volume 12, Page 90
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XIII.—On the Sacculi of the Polygastrica
Volume 12, Page 101
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Descriptions of some new species of Chalcidites
Volume 12, Page 103
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XVI.—Considerations on the tribe of the Podaxineæ, and description of the new genus Gyrophragmium
Volume 12, Page 111
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XVII.—On the different modes of preserving Microscopic Objects
Volume 12, Page 113
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Bibliographical Notices
Volume 12, Page 120
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Proceedings of Learned Societies
Volume 12, Page 125
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Geological Society
Volume 12, Page 128
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XX.—List of Birds obtained in the vicinity of Calcutta, from September 1841 to March 1843 inclusive
Volume 12, Page 165
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XXI.—Descriptions of two species of British Jungermanniæ
Volume 12, Page 172
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XXII.—On the Anatomy of the Pearly Nautilus
Volume 12, Page 173
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Description of the lurking machere (Machaerium subducens) from the northern coast of New Holland
Volume 12, Page 175
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XXIV.—Additional Observations on the Polygastric Sacculi
Volume 12, Page 178
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XXVI.—Note in reply to Mr. Hassall
Volume 12, Page 188
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XXVII.—Information respecting Scientific Travellers
Volume 12, Page 190
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Bibliographical Notices
Volume 12, Page 202
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Proceedings of Learned Societies
Volume 12, Page 207
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Miscellaneous
Volume 12, Page 229
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XXVIII.—Notice of a British species of Calliopæa, D'Orbigny, and of Four new species of Eolis, with observations of the Development and Structure of the Nudibranchiate Mollusca
Volume 12, Page 233
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XXIX.—On the Structure and Affinities of Upupa, Lin., and Irrisor, Lesson
Volume 12, Page 238
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XXX.—Upon the Anatomy of Phalangium Opilio (Latr.)
Volume 12, Page 243
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XXXI.—The Birds of Ireland
Volume 12, Page 254
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XXXII.—Descriptions of three new species of the Coleopterous genus Gyriosomus, Collected in Chile by T. Bridges, Esq
Volume 12, Page 258
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XXXIV.—Description of some apparently new Insects from the Congo, sent to England by Mr. Curror, Surgeon R. N., and the late Mr. John Cranch
Volume 12, Page 262
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Proceedings of Learned Societies
Volume 12, Page 276
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Miscellaneous
Volume 12, Page 296
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XXXVII.—On the Structure and Homology of the Cephalic Tentacles in the Pearly Nautilus
Volume 12, Page 305
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Description of six supposed new species of parasites
Volume 12, Page 312
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XXXIX.—On the Inflorescence of Fedia Olitoria, and its order of expansion
Volume 12, Page 317
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On the Acanthocephali
Volume 12, Page 326
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XLI.—Notice of a new species of Seal (Stenorhynchus serridens)
Volume 12, Page 331
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XLII.—On the Species of the Genus Limax occuring in Ireland
Volume 12, Page 332
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Descriptions of apparently new species and varieties of insects and other annulosa, principally from the collection in the British Museum
Volume 12, Page 342
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XLV.—Information respecting Scientific Travellers
Volume 12, Page 352
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Continuation of a memoir containing descriptions of new species of Coleoptera from Port Essington, in New Holland
Volume 12, Page 357
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Miscellaneous
Volume 12, Page 373
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XLVI.—General results of Microscopic Inquiries into the Minute Structure of the Skeletons of Mollusca, Crustacea and Echinodermata
Volume 12, Page 377
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XLVII.—Description of some New Species of the Genus Pachyodon
Volume 12, Page 390
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XLVI.—A Century of new Genera and Species of Orchidaceous Plants
Volume 12, Page 396
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XLIX.—On a new species of Marmozette in the British Museum Collection
Volume 12, Page 398
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L.—Observations on the Classification of the Mammalia
Volume 12, Page 399
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LI.—Catalogue of the Birds found in Corfu and the other Ionian Islands, also on the coast of Albania; from Notes made during a sojourn of four years
Volume 12, Page 412
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LII.—List of the Birds of the Island of Crete, from observations made during a stay of nearly two months, from 27th April to 18th June, 1843
Volume 12, Page 423
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LII.—Excerpta Zoologica, or abridged Extracts from Foreign Journals
Volume 12, Page 427
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Bibliographical Notices
Volume 12, Page 433
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Proceedings of Learned Societies
Volume 12, Page 436
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Miscellaneous
Volume 12, Page 451
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Proceedings of Learned Societies
Volume 12, Page 467