⛬ Six Parts of this Work are now published, Parts 1 and 2 containing Mammalia, by Mr. J. E. Gray, and Parts 3 and 4, Birds, by Mr. Gould; Part 5, Ichthyology, by Dr. Richardson; Part 6, Mollusca, by Mr. R. B. Hinds. 2. _Uniform with the preceding_, In Royal 4to. Parts, Price 10s. and 12s. each, containing on an average Ten beautifully Coloured Engravings, with descriptive Letterpress. ILLUSTRATIONS OF THE ZOOLOGY OF SOUTH AFRICA: Comprising Figures of all the new species of Quadrupeds, Birds, Reptiles, and Fishes, obtained during the Expedition fitted out by “The Cape of Good Hope Association for exploring Central Africa,” in the years 1834, 1835, and 1836, with Letterpress Descriptions, and a Summary of African Zoology. By ANDREW SMITH, M.D., Surgeon to the Forces, and Director of the Expedition. ⛬ The whole of the Plates are engraved in the highest style of Art, from the Original Drawings taken expressly for this work, and beautifully coloured after Nature. 20 Parts are now published. _With the Approval of the Lords Commissioners of Her Majesty’s Treasury._ GEOLOGICAL OBSERVATIONS MADE DURING THE VOYAGE OF HER MAJESTY’S SHIP BEAGLE, Under the Command of Captain Fitzroy, R.N. PART I.--(JUST PUBLISHED) ON CORAL FORMATIONS. By CHARLES DARWIN, M.A., F.R.S., Sec. G.S., &c. In 1 Vol. 8vo., Illustrated with Plates and Wood-cuts, Price 15s. bound in cloth. PART II.--ON THE VOLCANIC ISLANDS OF THE ATLANTIC AND PACIFIC OCEANS, Together with a brief Notice of the Geology of the Cape of Good Hope and of part of Australia, price 10s. 6d. Demy 8vo. cloth, with Map. Preparing for Publication, Demy 8vo., Illustrated with Map, Price 10s. 6d. cloth. PART III.--ON THE GEOLOGY OF SOUTH AMERICA. 3. THE ZOOLOGY OF THE VOYAGE OF H. M. S. BEAGLE, UNDER THE COMMAND OF CAPTAIN FITZROY, R.N. DURING THE YEARS 1832 TO 1836. Edited and superintended by CHARLES DARWIN, Esq., M.A. F.R.S. Sec. G.S. Naturalist to the Expedition. Comprising highly-finished representations of the most novel and interesting objects in Natural History, collected during the voyage of the Beagle, with descriptive Letterpress, and a general Sketch of the Zoology of the Southern Part of South America. Figures are given of many species of animals hitherto unknown or but imperfectly described, together with an account of their habits, ranges, and places of habitation. The collections were chiefly made in the provinces bordering on the Rio Plata, in Patagonia, the Falkland Islands, Tierra del Fuego, Chili, and the Galapagos Archipelago in the Pacific. THIS WORK IS NOW COMPLETE, And may be had in sewed Parts, Price 8_l._ 15_s._, or in half russia or cloth binding, at a small addition to the price. Nos. 1, 7, 8, and 13, FOSSIL MAMMALIA. By Richard Owen, Esq., F.R.S., Professor of Anatomy and Physiology to the Royal College of Surgeons, London. With a Geological Introduction. By Charles Darwin, Esq., M.A., F.R.S., V.P.G.S.