470 "The Lemuroidea and the Insectivora, ete. [ May, 
but the character is also found in the peccary, The typical spe- 
cies, A. insolens Cope (Fig. 17), is as large as the largest bears. 
The A. robustus Osborn, is about the same size. A large part of 
the skull has been discovered. This displays a very high sagittal 
~oeo-9*' 
.....- 
1G. 17.—Achenodon insolens Cope, lower jaw, three-eighths nat. size, from 
above, and right ramus from inner side, From Bridger epoch of Wyoming. Orig- 
inal, from Vol. 111 Report U. S. Geol. Survey Terrs., F. V. Hayden in charge. 
crest and a very small space for a brain. Its brain was probably 
of a low type, as has been shown to be the case in Arctocyon by 
Gervais. In that genus the hemispheres are smooth and very 
small, leaving the olfactory lobes and cerebellum entirely un- 
