PLATE LVIIc. 



Cranium of tlie specimen of Phenacodiis ijrimwvus, figured in Plate LVII b, two-thirds natural size. 



Page 435. 

 Fig. f.— Right side. , 



Fig. 2.— Top of skull. 

 pjjr. 3. — Superior view of mandibular ramus; a, inferior view of same; 6, posterior view. 



