List of Casts, Models, and Photographs. 



No. 7. Micronodon tenuirostris Osbom. 

 Type Lower Jaw. 



Cast, by courtesy of the Philadelphia Academy of Natural 

 Sciences, from the original there preserved. 



This specimen, referred by Emmons to Dromatherium 

 sylvestre, was shown by Osborn in 1886 to present important 

 differences, and made the type of a new -genus and species. 

 The specimen is so small that the cast is not very perfect in 

 detail. 



Price, S3. 



No. 8. Periptychus rhabdodon (Cope). 

 Brain Cast. 



Am. Mus. No. 3665. 



Periptychus, the most abundant quadruped of the Basal 

 Eocene Torrejon Formation, presents a very small brain re- 

 sembling that of a rabbit. 



Price, $1, 



No. 9. Pantolambda bathmodon Cope. 

 Brain Cast. 



Am. Mus. No. 3957. 



The brain of Pantolambda was ver}?- similar to that of its 

 contemporary Periptychus, and gives us the early Amblypod 

 type, ancestral to that of Coryphodon and Uintatherium. 



Price, $1. 



10. Giraffe-Camel. Alticamelus altus (Marsh). 

 Hind Limb. 



Am Mus. No. 9109. 

 Upper Miocene (Loup Fork) of Colorado, Am. Mus. Expedition, 1S98. 



Cast from the hind limb of the specimen in the American 

 Museum Collection. This animal, although a true Camel, 



