82 DR. J. E. GRAY ON THE TRIONYCHIDA. [Feb. 23, 
Testudo rafeht, Olivier, Voy. Pers. ii. 452, t. 11. 
Testudo euphraticus, Daud. 
Trionyx euphraticus, Geoff. 
Hab. Tigris and Euphrates. 
In the ‘ Catalogue of Shield Reptiles,’ p. 65, I noted that the skull 
is much shorter and broader than that of 7’. niloticus. 
DoGANIiA. 
Dogania, Gray, Cat. Tort. B.M. 49, 1844; Cat. Shield Rept. 69. 
Head depressed ; skull depressed, wide behind. The nose of the 
skull shelving ; the orbit large, subcentral. Forehead small, rhombic, 
not reaching to over the ear; occipital ridge very much produced, 
elongate. Palate concave, with a raised margin on each side behind, 
Fig. 1. Fig. 2. 
Dogania subplana. 
under the orbits, and with a deep concavity in front of the internal 
nostrils, which is dilated in front. The internal nostrils very large, 
i — 
