PL^TE 1. 



DINOCERATA. 

 Skull of DiNOCERAS MiRABiLE, Marsh. 



Two-fifths Natural Size. 

 Skull: obliauc view, type specimen (No. 10:30, Yale College Musenm,) _ _ 11 



This skull, from which the figures on the next six plates are also drawn, belonged to 

 an animal fully adult, as shown by the teeth, but not so old as to have the cranial sutures 

 oliliterated. The right canine is restored from the left, which is perfect. 



