CARNIVORA. 



397 



alone of all the Carnivora, both pairs of feet have only four 

 toes each. The hind-legs are shorter than the fore-legs, so 

 that the trunk sinks towards the hind-quarters, and the tail 

 is short. The tongue is rough and prickly. The head is 



Fig. 675.— Teeth of tlie left side of tlie upper jaw of Ictithe, iuiu ivbimtuin, \ie\vea uum below, 

 of the natural size. Upper Miocene, Attica. (After Gaudry.) 



extremely broad, the muzzle rounded, and the muscles of the 

 jaw extremely powerful and well developed. The claws are 

 non-retractile. All the molars are trenchant except the last 

 upper molar, which is tuberculate. The upper carnassial 

 has a small internal tubercle, and the lower carnassial is 

 wholly trenchant. 



The earliest Hysenas appear in the Upper Miocene de- 

 posits of the Siwalik Hills and of Europe, in which occur the 



Fig, 676.— Skull of Hyo;na spdcm. Post-Plioeene. 



remains of the genus Hyccna itself. In the Upper Miocene 

 of Greece are found the two extinct genera Hymnidis and 

 Lycmna, the former with affinities to the Viverridm. In the 



