I9IS-] 



LOWER PLIOCENE SNAKE CREEK BEDS. 



81 



examined. M. minor Douglass from near the bottom of the Lower 

 Madison Valley Loup Fork beds and M. furlongi Merriam from 

 the Thousand Creek beds, Thousand Creek, Nevada, are smaller 

 forms, while M. parviloba Cope from the Middle Miocene of Col- 

 orado is a larger animal than either ogygia or glarece, and M. 

 (Putoriiis) nambianiis from the New ^Mexican Loup Fork has a 

 shorter jaw than either of the species just mentioned. It is ap- 

 proached in size by specimens in the Princeton University osteo- 

 logical collection referred to M. americana, but differs, in addition 

 to the characters cited above, in the larger heels and heavier an- 

 terior basal ledges on the premolars and the greater degree of lat- 

 eral compression of these teeth. 



Fig. 4. Martes glarece, lower jaw, type specimen, external view and crown 

 view of the teeth, twice natural size, No. 12071. 



Measurements. 



Lengtli, Pa-niT 17 



P3 5X2 



Pt 5-8 X 2.1 



mx 8X3 



PsEUDAELURUs near intrepidus Leidy. 



The presence in the Snake Creek fauna of a cat not far removed 

 from Pseudaelurus intrepidus Leidy is indicated by a jaw fragment 

 No. 1 2081 Princeton University Geological Museum, collecting 

 locality lOOoC, which agrees with Leidy 's type fairly closely in the 

 dimensions of the jaw, but differs in having the teeth a little smaller 

 and the posterior accessory cusps and heels on the premolars less 

 strongly developed. A further dift'erence, which may be of little 

 importance, is found in the position of the mental foramina which, 



