0. P. Hay — Fossil Turtles in the Marsh Collection. 271 



The region immediately in front of the most anterior supra- 

 pygal presents various evidences of having suffered dis- 

 turbance. 



Notwithstanding the possession of ten pairs of costal plates, 

 this specimen is not elongated, as one might expect it to be. 

 Indeed, the width is relatively greater than in the specimen in 

 the American Museum. 



The plastron appears in no way different from that of the 

 other known specimens of the species. It is quite complete, 

 and a pen drawing showing its structure is here presented. 



The total length of the carapace is 325 inm ; the width is 

 210 mm . Leidy's specimen was at least 330 mm long and close to 

 235 mm wide. 



Hadrianus majusculus sp. no v. 



Plate XV ; Text-figure 5. 



The shell on which the present species is based was received 

 at the Yale University Museum late in the year 18T6. It 

 bears Professor Marsh's receipt number 927. The label has 



Figure 5. — Hadrianus majusculus. Diagram of carapace. 



the following record: "Turtle from foot of bluff, west side 

 of Murderer's Gap. Nov. 19, 1876. D. Baldwin." Another 

 label states that the specimen came from the "Eocene Bad 

 Lands, Gallina, New Mexico." This locality appears to be in 

 Eio Arriba County, New Mexico. The deposits doubtless 

 belong to the Wasatch epoch. 



