438 



THE CAT. 



[CHAP. xu. 



an extinct form which was as large as the lion. Certain portions of 

 the skull and of the mandible, with the lower sectorial, have been 

 more or less preserved. The description, however, as yet published 

 is too incomplete to admit of its place in the cat series supposing 

 that it really has a place there being determined. 



The name Trucifefo* has also been imposed on an upper sectorial 

 tooth, which is more like a cat's milk sectorial tooth than it is 

 like the permanent sectorial. It cannot therefore as yet, any more 

 than Limnofelis, be admitted as a recognised extinct member of the 

 cat group of animals. 



Our knowledge of the kinds which have been reckoned as distinct 

 species (i.e., of the species of the various fossil genera) is too frag- 



Fig. 190. PART OF LOWER JAW AND TEETH OF Eu-smihis Udentatus. 



A. Right side of mandible. 



a. Socket of lower sectorial. 

 c. Canine, 

 i. Incisors. 



B. Under surface of anterior end of 



mandible. 

 c. Canine. 

 i. The four incisors. 



mentary to admit of their enumeration, alongside of existing kinds, 

 as of equal value. Some four species of Dinictis, five of Pseudcelurus, 

 three or four of Hoplophoneus, two ofPogonodon and two of Nimravm, 

 and at least eleven of Machcerodus have been described. 



It is not possible to arrange the extinct and existing genera in one 

 series, but if the cheetah (Cyncelurus) and JElurodon be left out, the 

 rest may perhaps be arranged on either side of Felis (according to 

 their affinities to it and to each other) in the following order : 



1, Archczlurus. 2, Dinictis. 3, Nimravus. 4, Pseudcelurus. 5, 

 Felis. C, Hopkphonew. 7, Pogonodon. 8, Machcerodus. 9, Eus- 

 milus. 



* By Professor Leidy, 1. c., plate 28. 



