8 



MR. G. A. BOULENGER ON CHELONIAN REMAINS. [Jan. 6, 



88 millimetres. Owing to the less arlvanced age of the specimen, 

 the notch between the head and the external tuberosity does not exist ; 

 this notch I also find feebly marked in the skeleton of the not full- 

 grown Dermocheh/s coriacea preserved in the British Museum. The 

 fossil specimen is broken just above the radial process, but the outer 

 posterior tubercular prolongation of this process, so characteristic of 



Fig. 6. 



Proximal portion of left humerus of Eosphargis gigas. ^ nat. size. 



the Athecse, is -well preserved, and agrees strikingly with the figure 

 of Psepliophorus rupeUensis given by DoUo \ with which the type- 

 specimen of Eosphnrgis giyas also agrees, as stated by Lydekker ". 



In Eosphargis, as in Psephopliorus rupeliensis, the intertubercular 

 pit is close to the radial border of the humerus, whilst in Psepho- 

 phorus scaldii and in Dermochelys it is nearly equally distant from 

 either border. The whole shape of the humerus of Psephopliorus 

 scaldii approaches so much nearer to Dermochelys that it appears to 

 me questionable whether it is correct to refer P. scaldii, in the 

 absence of any information as to the ci'anial and exoskeletal 

 characters, to the genus Psejthophorus rather than to Dermochelys. 



1 BuU. Mus. Belg. v. 1888, pi. iv. fig. 7. 



2 Cat. Foss. Eept. iii. p. 220. 



