TESTUDINATA. 143 



bones are those of the less aquatic types of the Emydes. It is hkely, as 

 ah-eady remarked, that this genus belongs to the Adocidce. 



The following were the characters with which I commenced the origi- 

 nal description of the genus: "The elements of the carapace and plastron 

 are massive, and the former was well arched ; both exhibit well-defined 

 grooves for the sutures of the dermal scuta. The mesosternum is broad 

 ovate, and the bones of the plastron are united by immovable sutures. 

 The elevated lateral processes of the hyo and hyposternal bones are not 

 broad and unite by suture with the lower plate of the first and last bridge- 

 marginal bones. They are thus recurved in both cases, but none of the ribs 

 indicate any sutural union as is seen in various genera. The costal bones 

 unite with the marginals by serrate suture. In one species a large intergular 

 scutum has left its impression, the gulars being lateral and rather small. The 

 anterior lobe of the plastron is emarginate." 



I then added that the pubis was united by suture with the post-ab- 

 dominal (xiphisternal) bone, and inferred that the genus should, therefore, 

 be referred to the Pleurodira. I subsequently became convinced that the 

 bones showing this sutural union are really costals, bearing sutures for the 

 buttresses, and that there is no evidence to show that the sutural union of 

 the pubis and ischium which chai-acterizes the Pleurodira exists in this genus. 

 At the same time, having doubts as to the homologies of the dermal scuta 

 observed, I referred the species which displays the supposed intergular 

 bone to Emys. While I believe this course to be the proper one in the case 

 of one of the species {Emys testudinea) referred to Notomorpha, I now be- 

 lieve that the characters displayed by the other species {N. gravis) justify 

 the retention of the genus Notomorpha. 



The only species known to me was obtained from the Wasatch forma- 

 tion of Wyoming. 



NOTOMOEPHA GRAVIS Cope. 



Proceed. Amer. Philos. Soc, 1872, p. 476. N. garmani loc. cit., p. 476. Emys gravis Annual Report 



U. S. Geol. Surv. Terrs., 1872 (1873), p. 626. 



Plate XXXIII, figs. 14-16. 



This species is known from a number of separated bones which were 

 found together. It is probable that the pieces of carapace and plastron 



