M. 

 .020 

 .017 



526 THE WASATCH AND BRIDGEE FAUN^. 



Measurements. 



Dunensions of inferior Pm. IV ^^"'""P"^'^"^"^ 



c transverse 



t anteroposterior 025 



Dimensions of inferior M. H^ jjjjj^g^,gj.gg „._,(, 



Width of crown of inferior M. Ill, beliind 023 



Widtli of crown at crest 019 



Width of crown at tubercle 024 



CORYPHODON LATIPES Cope. 



Bathmodon latipes Cope, Annual Report U. S. Geol. Surv. Terrs., F. V. Hayden, 1872 (1873), p. 583. 



Proceed. Amer. Philos. Soc, 1873, p. 70. 



PI. xxix6, figs. 4-5; xlviii, figs. 7-14. 



The remains of Coryphodontidce obtained by Dr. Hayden, near Evans- 

 ton, Wyoming, in 1871, included parts of two distinct species, a large and 

 a small, which I described as Bathmodon radians and Cort/phodon latipes, 

 respectively. The bones were mixed together when they came into my 

 possession, but in most instances it is not difficult to distinguish them. An 

 expedition which I made to the same locality, in 1873, enabled me to 

 procure many additional bones of both species, and to confirm the distinc- 

 tions already observed. It remains, however, difficult to assign a few of 

 the bones to their proper species, and an astragalus indicates the possible 

 existence of a third one. 



The smaller specimens obtained by Dr. Hayden, include atlas, axis, dor- 

 sal and lumbar vertebrae, scapula, humerus, phalange, femur, astragali, &c. 



The transverse process of the atlas is stouter and less flattened at the 

 base than in B. radians. The axis is but little oblique, and has a low, 

 obtuse hypapophysis below. Its form is much as in the larger species, 

 being rather elongate, but shorter than in Bhinocerus and other Perisso- 

 dactyles. The dorsals and liimbars are short and plane; the former are 

 obtusely, the latter acutely, keeled below. 



The glenoid portion of the scapula differs notably from that of the B. 

 radians. Besides being smaller, it is narrower, its outline contracting 

 regularly from the posterior border to the coracoid process, instead of 

 curving outward to it as in B. radians. The external face at the base of 

 the coracoid is nearly plane in C. laiipes, but is strongly concave in B. 

 radians. The astragalus is considerably broader than long, the apex turned 

 outward in front of the inner malleolus, being especially produced. The 



