39 i Zoological Society. 



plotherium Sivalense, F. and C, with Crocodilus biporcatus and C* 

 (Lepforhyncus) gangeticus or the Magar, and Garial (Gavial), which 

 now inhabit the Ganges, showing that the quadrumana existed, with 

 a member of the oldest Pachydermatous genus of Europe and reptiles 

 of the present day. 



The camel (Camelus Sivalensis, F. and C), antelope, and ano- 

 plotherium have been exhumed from the same bed. There have been 

 found also the elephant, mastodon, hippopotamus (H. Sivalemis and 

 H. dissimilis, F. and C.)» rhinoceros, hog, and horse, together with the 

 S'watherium giganteum, a huge ruminant, exceeding in size the largest 

 rhinoceros, armed with four enormous horns, divided and foli- 

 ated like the dicranocerine antelopes. There is also a musk deer 

 scarcely larger than a hare j specimens of the cat (Fells cristata, 

 F. and C.) and of the dog tribe ; the hyaena, bear (Ursus Sivalensis, 

 F. and C), and ratel, with other carnivora. Of the feathered tribe, 

 there are Grallse much larger than the gigantic crane of Bengal 

 (Ciconia Argala). Of reptiles, besides the magar and gavial, there 

 are other crocodiles of enormous size (C. Leptorhyncus crassidens, 

 F. and C.) j and of Testudinata ordinary-sized species of emys and 

 trionyx, with humeri and femora as well as corresponding fragments 

 of the bucklers of a species as large as the corresponding bones of 

 the Indian rhinoceros. The authors refer to the " Journal" and f* Re- 

 searches of the Asiatic Society of Bengal" ["the Asiatic Researches"] 

 for descriptions of their new species. 



ZOOLOGICAL SOCIETY. 

 [Continued from p. 201.] 



December 27th, 1836. — The remainder of M. F. Cuvier's Paper 

 on the Jerboas and Gerbillas was read. 



M. Cuvier commences this memoir with observing that his atten- 

 tion has been particularly directed to the Rodentia, with a view of 

 arriving at a natural classification of the numerous species composing 

 that order, among which considerable confusion had hitherto pre- 

 vailed, particularly in the genera Dipus and Gerbillus, the relations 

 of which to other allied groups have been but very imperfectly un- 

 derstood by previous writers. 



The species included in the genus Dipus have been formed by 

 M. Lichtenstein into three divisions, which are distinguished by the 

 absence and number of rudimentary toes upon the hind feet. In the 

 first section are placed those with three toes, all perfectly formed ; in 

 the second, those with four, one of which is rudimentary ; and in the 

 third, those with five, two of these being rudimentary. M. Cuvier 

 states that he is unacquainted with the second division of M. Lich- 

 tenstein, but in the examination of the species belonging to the first, 

 in addition to the absence of rudimentary toes, he finds they are also 

 distinguished from those of the third by the form of the teeth, and 

 the osteological characters of the head. These points of difference 

 he considers of sufficient importance to justify his making a distinct 

 genus for the Jerboas with five toes, adopting the name Allactaga, 

 given by Pallas to a species, as the common generic appellation. 



