CONTENTS. V 



Page 



XX. On a new Species of Plesiosaurus from the Portland Lime- 

 stone. By Habry G. Seeley, F.G.S., St. John's College, Cam- 

 bridge 181 



XXI. On the Condors and Humming-birds of the Equatorial 

 Andes. By James Orton, of Poughkeepsie, N. Y 185 



XXII. Descriptions of two new Species pertaining to the Avifauna 



of Australia. By John Gould, F.R.S. &c 192 



XXIII. Whence comes the Nourishment for the Animals of the 

 Deep Seas ? By Prof. Karl Mobius 193 



XXIV. The supposititious '^ Bos {?) pegasus" of the late Colonel 

 Charles Hamilton Smith. By Edward Blyth, Hon. Memb. As. 

 Soc. &c " 204 



XXV. On the Organization of the Worms of the Genus Perichceta. 



By Edmond Perrieb 207 



XXVI. Description of a new Fossil Balanus. By Edward 

 Pabfitt 210 



Note on Testudo Phayrei, by Ferd. Stoliczka ; On a new gigantic 

 Salamander (Sieboldia Davidiana, Blanch.) from Western China, 

 by E. Blanchard ; On the Pedicellarise and Ambulacra of Echi- 

 nonetis, by Edmond Perrier ; On the Reproduction of the Lo- 

 phobranchs, and on the Filiation of certain Genera, by M. 

 Canestrini ; On a new Organ of Innervation, and on the Origin 

 of the Nerves of Special Sensibility in the Aquatic Pulmonate 

 Gasteropoda, by M. Lacaze-Duthiers ; Further Observations on 

 the Development of the Crayfish, by S. Chantran ; On Hypo- 

 cotyledonary Gemmation, by Prof. Asa Gray 212-220 



NUMBER XLVI. 



XXVII. Outline of a Scheme of Classification of the Invertebrata, 

 founded upon the ProgTessive-Development Theory. By John Denis 

 Macdonald, M.D.,F.R.S., Staff"-Surgeon H.M.S. 'Lord Warden' . 221 



XXVIII. Examination of Deep-sea Soundings ; with Remarks on 

 the Habit and Structure of the Polycystina. By John Denis Mac- 

 donald, M.D., F.R.S., Staff"-Surgeon H.M.S. 'Lord Warden ' .... 224 



XXIX. Note on some Chelonian Remains from the Loudon Clay. 



By Harry G. Seeley, F.G.S., St. John's College, Cambridge .... 227 



XXX. Notes on some African Birds. By R. B. Sharpe,F.L.S. &c., 

 Librarian to the Zoological Society of London 234 



XXXI. On the Nomenclature of the Foraminifera. By W. K. 

 Parker, F.R.S., T. Rupert Jones, F.G.S., and H. B. Brady, 

 F.L.S., F.G.S 238 



