206 



DINOCERATA. 



The tyjje of this species (number 1043) was found by. Mr. J. Heisey, 

 in May, 1874, near Haystack Mountain, Wyoming. 



The remains consist of a skull, and other portions of the skeleton. 



The geological horizon is in the Bridger beds of the Middle Eocene. 



The only known specimen of this species is in the Yale College 

 Museum. 



Tinoceras coi'iiutiim. Cope, sp. 



Woodcutis: 180, isi, liflou-. 

 Fig. 180. 



Figure 1 80. — Skull of Tinoceras cornulum, Cope, sp. 



This figure and the following were photograj)lied on wood from Prof. 

 Cope's original photographs, for which the author is indebted to the late 

 Prof. Louis Agassiz. These i)hotograplis, although both marked ^g, are not 

 of the same size. The present figures are copies, both reduced in the 

 same proportion. . The white iiortion at the base of the tusk is plaster, and 

 the tooth is thus made to aj)pear longer than in nature. The tusk itself 

 belono-s on the other side. 



