736 EEPTILIA. 



folds. The intestine preserves the character of the true Batagurs, such as B. 

 lineata, B. duvaucelli, and B. baska, in having a simple sigmoid turn after the trans- 

 verse colon. The caecum also is rudimentary, as in the foregoing species, and not so 

 developed as in 5. {Sardella) tliurgi. The large intestine, in the largest male, 

 measured from its lower internal end to its junction with the small intestine, 2 feet 

 4""75 ; and the small intestine, with its walls much contracted on themselves, was 

 5 feet 2"*75. The cloacal bladders are well developed, also the allantoic bladder 

 itself. It has large inguinal glands. 



The liver has the general characters of this organ in Batagur (Morenia) 

 ocellata. 



There are no osteological features to entitle this animal to be separated generi- 

 cally from B. lineata or B. duvaitcelli, nor is there anything in its soft anatomy 

 to justify such a sub-division of the species. 



It occurs throughout the Irawady, from the estuary streams up to Bhamo, 

 where it is not uncommon. Theobald records it from the Movdmein river and the 

 Salween. It does not occur ia Bengal, as far as I am aware, where it is represented 

 by B. dtwaucelli. 



Batagur iravadica, n. s. Pis. LXIV, LXY, LXVIII, & LXIX. 



Batagur trivittata, Tteobald, Journ. Linn. Soc, vol. x, 1868, p. 14 ( ? only) ; Journ. As. See, 



Bengal, ex. No., vol. xxxvii, 1868, p. 13 ( ? only). 

 Kachuga trilineata, Theobald, apud Gray, Proc. Zool. Soc, 1869, p. 200 (skull, fig. 13) j Gray, 



Suppl. Cat. Shd. Rept., 1870, p. 54, jiars. fig. 19 (not Nepal specimen) ; id., App. Cat. Shd. 



Kept., 1873, p. 18,j>)«w.; Theobald, Proc. Zool. Soc, Lond., 1870, p. 676. 

 Kachuga fusca, Gray,^jar*. Suppl. Cat. Sh. Rept.,'1870, p. 56. 

 Batagur trivittata, Theobald, Descr. Cat. Rept., B. Ind., 1876, p. 21 ( $ only). 



Adult ? . The shell anteriorly is less full than in old males of B. trivittata, 

 and not so roundedly arched from side to side, and it is more downwardly arched 

 anteriorly. The vertebral ridge is feebly marked. The posterior portion of the 

 sheU is expanded, and the marginals about the 7th, 8th, and 9th slightly reverted. 

 The lateral ridge on the plastron is not persistent in the adult. 



The nuchal is large and triangular, with its base placed posteriorly. The vertebral 

 shields have much the same form and arrangement as in B. lineata and B. tri- 

 vittata, but the three first vertebral plates in adult females are not so broadj as 

 in the males of the latter species, and theii' lateral margins are more convex, 

 but in other respects these plates and those that follow much resemble the corre- 

 sponding plates of the males of B. trivittata. There are, however, certain difPerences 

 between the two which would seem to be persistent in the adults. In the adult 

 male of B. trivittata the lateral margins of the first vertebral are nearly straight, 

 whereas in adult females of B. iravadica the lateral margins are markedly concave 

 towards the mesial Hue, and the same holds good of the second vertebral, which in 

 this respect differs from the nearly straight- sided corresponding shield of the B 

 irivittata. The anterioi' section of the plastron is not so bimd as in the males of 



