CONTENTS. 



Page 



Art. XL. ^otes on the internal appearance of several ./Animals 

 examined after death, in the collection of the Zoological So- 

 ciety. By William Yarrell, Esq., F.L.S., Sfc. . . . 314 



Art. XLI. Observations on the structure of the Heart of the 

 Testudo Indica, founded on the examination of a Specimen 

 in the Collection of the Zoological Society. By G. J. Guth- 

 rie, Esq., F.R.S., Professor of .Anatomy and Surgery, 

 Royal College of Surgeons, ^c 322 



Art. XLII. .N'otes taken during the examination of a Specimen 

 of Testudo tahulata, which lately died in the Collection of 

 the Zoological Society. By Thomas Henry Holberton, 

 Esq., M.R.C.S., 8fc 325 



Art. XLIII. Observations on the Vultur Calif or nianus of SYta.w, 



By David Douglas, F.L.S., Sfc . 328 



Art. XLIV. Observations on two undescribed species of Morth 



American Mammalia. By David Douglas, F.L.S., ^c, 330 



Art. XLV. On Aplodontia, a new genus of the order Rodentia, 

 constituted for the reception of the Sewellel, a burrowing 

 Animal which inhabits the Korth Western Coast of Ame- 

 rica. By John Richardson, M.D., F.R.S., F.L.S., ^c. 333 



Art. XL VI. Description of the Animal to which belongs the 

 Shell called, by the Baron de Fhussac, Helicolimax La- 

 mar cUi. By the Rev. R. T. Lowe , . . 338 



Art. XLVn. Sketches in Ornithology, Sfc. By N. A. Vigors, 



Esq.,M.A., F.R.S., Sec 345 



Art. XLVIIL Observations on new or interesting Mollusca con- 

 tained, for the most part, in the Museum of the Zoological 

 Society. By W. J. Broderip, Esq., F.R.S., Sec. G.S., ^c, 

 and G. B. Sowerby, F.L.S., Sfc SO ^ 



Art, XLIX. Observations on some of the Mammalia contained 

 in the Collection of the Zoological Society. By Thomas 

 Horsfield, M.D., F.R.S., ^c, and ^. A. Vigors, Esq. 

 M.A., F.R.S., ^c. . . 380 



Art. L. Analytical Notices of Books 385 



