1918] Merriam: Neiv Mammalia from the Idaho Formation 529 



from the Idaho beds at locality 3039 is not apparently less Equus-like 

 than the teeth from near Ringold, unless it be in the character of the 

 anterior portion of the protocone, which is unfortunately broken away 

 in the Payette River specimen. The portion of the protocone remain- 

 ing in the Payette River specimen is perhaps a little thicker trans- 

 versely than in the Ringold specimen, but a complete protocone might 

 show more advanced lateral compression. 



Fig. 4. Equus idahoensis/ M 1 ?, occlusal and outer views, no. 22346, natural 

 size. Prom beds referred to Idaho formation, bluffs on north side of Payette 

 River about four and one-half miles southeast of Payette, Idaho. 



Pig. 5. Equus idahoensis? Pj, outer and occlusal views, no. 22347, natural 

 size. Prom beds referred to Idaho formation, near Proman Ferry, Snake River,, 

 Idaho. 



