294 



MAMMALIA. 



articulate distally both with the astragalus and the calcaneum. The 

 typically Amblypodous feet are well seen in figs. 167 B, c. The first- 

 discovered evidence of Coryphodon was a fragment of mandible from the 

 Lower Eocene of the London Basin, named Coryphodon eoccenus. Other 

 portions of jaws and limb-bones have subsequently been met with on the 



IV 



FIG. 167. 



Coryphodon hamatus; outline of upper aspect of cranium, showing also size and 

 form of brain-cavity (A), drawing of left manus (B), and drawing of left pes 

 (c), the first being one-fifth, the others one-third nat. size. L. Eocene 

 (Wasatch Formation) ; Wyoming. (After Marsh.) 



same horizon both in England and France. The only important speci- 

 mens hitherto found, however, are American. Nearly complete skeletons, 

 besides many fragments, have been discovered near the base of the Eocene 

 (Wasatch stage) in Wyoming, Utah, and New Mexico, and one of the 

 best-known forms is Coryphodon hamatus (fig. 168), an animal attaining 

 a length of about two metres. 



