290 Bibliographical Notices. 



referred to Tctitherium. The hinder cheek-teeth are the same in 

 number as in the Weasel tribe, Civets, primitive Hyaenas, and Cats, 

 but a closer resemblance is found with the Hjsenas, while the fossil 

 resembles the primitive Cats in having a talon and inner cusp to the 

 first mandibular molar. But though it is referred to the Hysenidse, 

 it is not supposed to be an ancestor of Hymia, but to have stronger 

 relations with the ancestral Felidse. 



TheFelidae are defined as having the carnassials well developed, but 

 with not more than one upper true molar or two lower true molars. 

 In this group 13 genera are placed, and in so far as the author departs 

 from the views of Prof. Cope he follows Prof. Mivart. No attempt is 

 made at a linear arrangement, though the genera as arranged exhibit a 

 progressive advance in the structure of the carnassials an da diminished 

 number of premolars and lower molars. Three lines of development 

 of the Felida3 are represented by the Cheetahs, true Cats, andMach^ro- 

 donts. The Indian tj^DOS from the Siwalik beds commence with a 

 description of the new genus j3i!lurops{s, of which only one species is 

 known, u3^. annectans. The number of hinder cheek-teeth is the 

 same as in LeptJiycena ; the jaw is very deep, and this depth is perhaps 

 its most distinctive character. A descending symphysial expansion 

 of the jaw is a character common to some primitive Cats and Machv- 

 roclus. The second genus, JElvrogale, is represented by a species ^.E. 

 sivahnsis ; it is distinguished from Pseudcelurus by the vertical sym- 

 physial ridge, from Proahirus in wanting the inner cusp to the first 

 mandibular molar. The species is most closely allied to the yElw'o- 

 gale intermedia, and it is intermediate in size between the Thibetan 

 lynx and the leopard. The third genus, Felis, is first known in 

 Europe in the Middle Tertiary of Sansan, and other species occur in 

 America in the Middle Tertiary of the Loup Fork group. FeUs 

 cristata is the first known of the Siwalik Cats ; to this species the 

 author refers the Felis grandi cristata of Bose. In many respects 

 the skull of the lion approaches nearer to the fossil, though it 

 agrees with the tiger in the relative proportions of face and 

 cranium, and the greater gap between the third premolar and the 

 canine ; while the skull of the jaguar in the outline of the profile 

 most closely resembles the fossil. The specimen which was named 

 grandicnstata probably belonged to an old male. A second species 

 is the Felis hraclujgnathus ; the canines are too small to permit of the 

 specimens being associated with Felis cristata. A third species, un- 

 named, is allied to the Felis pardus, a fourth to the Felis lynx, a fifth 

 is the Felis subJmnalayana, which was about the size of the jungle- 

 cats of India. A sixth species is indicated, but not determined. 

 The last genus of Cats is Maclurrodus, which commenced at the 

 close of the Lower Tertiary and is common in the Middle Tertiary 

 of Europe, America, and Northern India. Nine species have been 

 described, besides several which are more or less doubtful. There 

 are two Siwalik species, Macluerodus sivalensis and M. palcmidicus. 

 The former in its cranial characters comes nearest to the American 

 species M. necator ; the latter also agrees with this and other 

 American species, but in cranial characters approximates to M. 



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