PLATE XIV. 



a 



a 



Fig. 1. 



Fig. 2. 



Fig. 3. Fig. 4. 



FiGUBEs OF Casts of Bratn-Ciiambers of Extinct MAiiMALiA. 



Fig. 1, Periptychus rJiahdodon., cast of roof of brain case, showing middle-brain hemispheres and 

 part of olfactory lobes, natural size. Original ; from Puerco bed of New Mexico. Fig. 2, Uinta- 

 therium mirabile^ one third natural size, from Marsh. From Bridger bed of Wyoming. Fig. 3, 

 Phenacodus primoevvs^ one half natural size. Original ; from Wasatch bed of Wyoming. Fig. 4, 

 Procamelus occidentalism one half natural size. Original; from Loup Fork bed of New Mexico. 

 Figs, o, profile ; ft, above ; c, below. 



