PLATE XIV. 



a 



a 



Fig. 1. 



Fig. 2. 



Fig. 3. Fig. 4. 



FiGUBEs OF Casts of Beain-Cii ambers of Extinct Mammalia. 



Ficr. 1, PeriptychxLS rTiabdodon, 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 primcevvs^, 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, a, profile ; 6, above ; c, below. 



