788 EEPTILIA. 



the under surface yellowish-white. Since then, however, Theobald^ has figured 

 and described under the name of T. careniferm, Gray, (?) and also under the name of 

 T. phayrei, Theob., without any expression of doubt, the head and shell of a fresh 

 water turtle from Pegu. Mr. Theobald was so good as to allow me to make a coloured 

 drawing from the same specimen, and I have compared the heads of a series of eight 

 turtles from Moulmein, Myanyoung, and Bham6 on the Irawady, with it, and 

 all of them exactly agree with the animal which he in 1873 considered to be 

 his T. pliayrei. At the same time^ Mr. Theobald figured from a specimen 

 obtained at Moulmeia another species which he regarded as Trionyx stellatus, 

 Geoff. 



The head of the specimen referred to T. phayrei, is reticulated on its upper 

 sm'face with black elongated irregularly formed spots, which extend partially on 

 to the upper half of the thick upper lip, but not on to its lower half, nor on to the 

 under surface of the head. The head is moderately broad. 



The head of the turtle from Moulmein referred to T. stellatus, Geoff., is narrower 

 and more pointed than the former, and the head is covered more densely, and is reti- 

 culated by broken black spots or markings which are more open on the sides of the 

 head. They extend, however, over the upper lip and on all the under surface of the 

 head, and the marking, although generally the same ia both, is specifically distinct 

 from the first mentioned head. 



Mr. Theobald has figured'' one-half of the carapace and one-half of the plas- 

 tron of each species. The pitted reticular structure of the carapace of T. careniferus. 

 Gray (?) = T. phayrei, is represented as being coarse, but not nearly so much so as in 

 the carapace of T. stellatus, Geoff. 



The under surface of the plastron of T. careniferus. Gray (?)= T. phayrei, 

 Theob., is figured perfectly smooth, with no trace of granulations, but the figure is so 

 small as not to show a slight tendency to granulation, visible in the specimen 

 figured, and which is shown in the drawing I had made, of life size, from the 

 specimen. 



This plastron has a very strong resemblance to the plastron of the Trionyx 

 figured by Gray* as T. subplanus. A specimen in the British Museum named 

 Docjania subplana appears to be the specimen figured. The characteristic features of 

 this plastron, as of the plastron figured by Theobald, is the heavy entoplastron and 

 the smooth surface of the other elements. There is no evidence, however, that 

 this Trionyx is the T. subplanus, Geoff., as that species was founded on a carapace 

 only, which Geoffrey considered might have appertained either to the Trionyx of 

 Georgia or of the Euphrates. I have never met in the Gangetic system with a 

 tortoise Uke Gray's specimen referred to T. subplanus and figured as such, and as 

 coming from the Ganges; but General Hardwicke apparently received the specimen 



> Obs. on Ind and Burm. Triony,, 1873, p. 7. pi. ii, et Proo. As. Soe., Bengal, 1874, p. 75, pis. iii & iv. 



fr. C.J p. D, pi. 1, 



* I. c, pis. i and ii, et I. c, pis. iii & iv. 



* must. Ind. Zool., vol. i, 1832, pi. Ixxix. 



