EXPLANATION OF PLATE X. 



Represents the nearly complete shell of Eai YS wyomingensis, one-lialf the natural size. It was originally 

 referred to a species with the name of Emys Jeaneni. Specimen obtained from the vicinity 

 of Fort Bridger, dnring Professor Hayden's exploration of 1870. 



Fig. 1. View of the plastron. 



Fig. 2. View of the carapace. 



