95 



longitudinally and transversely ; the articular faces are deep 

 and submferior. 



From Henry's Fork. 



HADRIANUS OCTONARIUS, Cope. 



Geol. Survey of Terrs., 1872. p 630. 



Represented by the right humerus of a large individual. 



This bone is intermediate in character between the corre- 

 sponding bones of Testudo and Emys. The head is longer and 

 narrower than in the former genus ; it is implanted on a short, 

 distinct neck, and is strongly convex in both directions. The 

 articular surface extends to the base of the internal tuberosity. 

 The tuberosities, especially the external one, are very large 

 and thick. The external rises above the head, and resembles 

 that of Emys in shape. The fossa separating the tuberosities 

 is comparatively narrow. The shaft is much like that of 

 Emys, but is somewhat more strongly curved ; not so much, 

 however, as in Tcstudo, and the distal end is not so much flat- 

 tened. The anconeal fossa is wider and deeper than in either 

 genus. The trochlea is broad, and divided by an obscure 

 groove into a small and convex radial face, and a nearly 

 plane (transversely) ulnar face. The condyles are prominent 

 and rugose. 



Found near Dry Creek. 



EMYS. 



EMYS WYOMINGENSIS, Leidy. 



Cont. to Ex. Vert. Fauna, p. 140. 



Represented by six perfect shells from Cottonwood and 

 Dry Creeks, and Henry's Fork, and a shoulder girdle from 

 Cottonwood Creek, which is provisionally referred to this 

 species. 



This species, when adult, was upward of a foot in length, 

 and in the composition of the shell, number of scutes, etc., 

 resembled the living species of the genus. 



The Shoulder Girdle has the form characteristic of the 

 Emydida, but presents some peculiarities. The scapula is 

 short, not being as long as the coracoid, and is not so straight or 

 cylindrical as is usual in Emys ; but is compressed, and some- 



