1919] Merriam: Tertiary Mammalian Faunas of Mohave Desert 469 



MACHAERODONT, indet. 



A number of other loose limb elements are evidently to be referred 

 to some of the types distinguished above. Several felid metapodials 

 represent a machaerodont eat about as large as a puma. Among them 

 4 s a metapodial five of the anterior limb, no. 19466 (figs. 22a-, 22?;), 

 a moderately heavy element. The type of a foot represented by this 

 phalanx seems heavier than in Dinictis, and a little less massive than 

 in Smiloelon. No. 21515 (fig. 23) possibly belongs to the same species. 

 No. 19399 (figs. 24a, 24&) represents a smaller form of heavy meta- 

 podial possibly representing Aelurodon. 



It is evident from the limb material present that at least three 

 types of large eats were present in the Barstow fauna. 



FELID?, indet. 



The posterior end of a mandible, no. 21571 (figs. 26a and 266), is 

 from a form approximating the size of the Recent African lion, and 

 would seem to have feline rather than machaerodine characters if it 

 represents the cats. The angle is separated by a considerable distance 

 from the condyle. It protrudes well behind the condyle, and is sit- 

 uated almost immediately below the base of the coronoid process. 

 These characters generally distinguish the feline type from the more 

 specialized machaerodine forms, in which the angle is nearer the 

 condyle, does not project markedly behind the condyle, and is situated 

 beneath the outer end of the condyle some distance laterad of the base 

 of the coronoid process. 



PSEUDAELURUS, sp. 

 A portion of a lower jaw without teeth (no. 21516, fig. 27) from 

 the Barstow beds represents a cat of the Pseudaelurus type not differ- 

 ing greatly from P. intrepidus of the Upper Miocene Nebraska beds. 

 The Barstow specimen approaches the type specimen of P. intrepidus 

 in dimensions and in proportions of teeth and jaw, but seems slightly 

 heavier. The California form possibly represents a distinct species, 

 but this is not clearly demonstrated by the available material. 



Measurements 



P. intrepidus 



No. 21516 Type 



Height of mandible below anterior end of P 4 25.8 mm. 23.3 



Greatest thickness of mandible below anterior end of P 4 .... 12.5 12.3 

 Approximate length, posterior border P 4 to posterior border 



inferior canine 39.5 40.3 



