1919] Merriam: Tertiary Mammalian Faunas of Mohave Desert 471 



Of the Old World forms Pseudaelurus quadridentatus from the 

 Miocene of Sansan is apparently as near to the Barstow form as any 

 of the described species. The forms 

 from Pikermi recently referred to a 

 new genus, Paramacherodus, by Pil- 

 grim are distinguished by the more 

 prominent anteroinferior angle of the 

 mandible. This is also true of the 

 Paramacherodus specimens from the 

 Middle Siwaliks of India. Sinaelurus 

 of the lower Siwaliks shows less prom- 

 inence of the anteroinferior angle, as 

 in the California Pseudaelurus, but 

 one might suspect that the third 

 inferior premolar is relatively smaller 

 and that the form of the jaw is not 

 identical in the two types. Lydekker's 

 specimen of Aelurogede sivalensis 

 described from the Siwaliks of the 

 Punjab 26 shows rather more resem- 

 blance to the Barstow form, but 

 Lydekker's specimen is referred by 

 Pilgrim to the genus Paramachaero- 

 dus. 



RODENTIA 

 LEPUS?, sp. 



A few fragmentary remains, no. 21232, from locality 2056, repre- 

 sent a rabbit-like form from the Barstow beds. An astragalus from 

 locality 1396 is similar to that of Lepus. 



PROBOSCIDEA 

 TETEABELODON ?, sp. 



Numerous fragmentary remains of proboscideans have been found 

 in the Barstow fauna, but in general they indicate nothing more 

 than the presence of a large Tetrabelodon-like form with somewhat 



26 Lydekker, B., Mem. Geol. Surv. India, scr. 10, vol. 2, pi. 44, figs. 7 and 7a, 

 1884. 



26a 26b 



27 



Bigs. 26a and 26&. Belid?, in- 

 det. Bosterior end of mandible, 

 no. 21571, X y-i. Big. 26a, post- 

 erior view; fig. 26b, inner view. 

 Barstow Miocene, Mohave Desert, 

 California. 



Big. 27. Pseudaelurus, sp. Man- 

 dible, lateral and dorsal views, no. 

 21516, X %. Barstow Miocene, 

 Mohave Desert, California. 



