PLATE XXIV6. 



Vig. 1. Calamodou simplex. Left mandibular ramus, two-tliirds natural size. From the Wasatch of the 

 Big Horn Basin, Wyoming, J. L. Wortmau; o, do. superior view; J, anterior view of symphysis . 

 Alveolar wall of incisors absent. Page 189. 



Fig. 2. — I'sittacotherium multifragum. Pnercobeds, N. W. New Mexico, D. Baldwin. Mandible, natnra 

 size, from right side. 2a, the same from above; b. symphysis, from front. Page 196. 



Fig. 3. — Psiltacotiicrium aspasice. Type; fragment of left mandibular ramns, natural size. Page 19b. 



Fig. 3(1. — Tlic .same from above. 



Fig. 4. — I', anpasiw. Part of left ramus of an adult, inner side. New Mexico. D.Baldwin. Page 196. 



