Cope.] 52 (May 4, 1877. 
resembles Oreodon, but in this genus the internal convolution is continu- 
ous with the supraorbital.* 
EXPLANATION OF PLATE. 
Brain of Procamelus occidentalis from a cast, two-thirds the natural size. 
Fig. 1. View of the left side. 
Fig. 2. View of the superior surface. 
Fig. 8. View of the inferior surface. 
* Leidy, Extinct Fauna, Dak, and Nebraska, pl. xiv. fig. 11. 
PUBLISHED JUNE 15, 1877. 
