764 EEPTILIA. 



Tlie form B. petersi appears not to be common, and although Blyth obtained 

 his specimens in Calcutta, there is no evidence that they were found near 

 Calcutta. According to my experience, most of the Chelonia that find their way 

 to the Calcutta market come from considerable distances. The specimens I 

 have obtained are four in number; one female obtained by Mr. G. Nevill at 

 Huzurapur in the Jessore District, two males from Eurreedpore, and one male from 

 Dacca. 



Sub-Genus Habdella, Gray. 



Axillary and inguinal septa of the shell strongly developed as in the ordinary 

 species of Batagnr. Alveolar surface of the upper jaw very wide, and antero- 

 posteriorly long, as in Morenia. An oblique raised dentated ridge in its middle, 

 on either side, separated anteriorly by a deep pit over the premaxillaries. Margins 

 of the upper and lower jaws strongly dentated. A deep premaxillary notch 

 Avith a prominent tooth on either side of it, the high smyphysial tooth of the 

 lower jaw fitting into the notch. The lower jaw with a ridge on each side 

 separated anteriorly by a longitudinal groove. 



-j- Batagur (Habdella) thtjbgi. Gray. 



Emys ikurjii, Gray, Syn. Rept., p. 22, 1831; Dum. & Bibr., Erpet. Gdnl., vol. ii, 1835, p. 318 ; 



Dumeril., Cat. Method Eept., 1851, p. 14. 

 Emys tkurgii, Gray, Cat. Tort. B. M., 1844, p. 17; id.. Cat. Shd. Kept., B. M., 1855, p. 21 ; Blyth^, 



Journ. As. Soc, Bengal, vol. xxii, p. 63, 1855; id., I. c, vol. xxxii, p. 81, 1863. 

 F/mi/s thuji, Gray, 111. Ind. Zool., vol. i, tab. 78, 1832. 



£mj/s Jlavonigra, Lesson, Bull, de Sc. Nat., t. xxv, p. 12; Voy. de Belanger, Zool., p. 293, 1834. 

 Clemmp thurgi, Strauch, Chelon. Stud., p. 32, 1862; id., Vertheil. Schildkr., p. 71, 1865. 

 £mys thurgi, Gimth., Kept. o£ Brit. Ind., p. 24, 1864. 



Kachiga olclliami, Gray, Proc. Zool. Soc, Lond., 1869, p. 200, fig. xiv, skull. 

 Batagur thurgi, Gray, Proc. Zool. Soc., Lond., 1870, p. 708; Theobald, Journ. As. Soc., Bengal, 



vol. xxxvii, ex. No., 1868, p. 12; Descr. Cat. Kept., Brit. Ind., p. 23, 1876. 

 Hanlella thurgi, Gray, Suppl. Cat. Sh. Rept., B. M., p. 58, fig. xxi, 1870; id., App. Cat. Shd. 



Kept., B. M., p. 18, 1873; Theobald, Proc. As. Soc, Bengal, 1872, p. 84; Hand List, 



Sh. Kept., 1873, p. 52. 

 TIardella indi, Gray, Suppl. Cat. Shd. Rept., 1870, p. 58; id.. Hand List, Sh. Rept,, p. 52, 1873. 



The shell of the female is an elongated oval, narrower in front than behind, 

 attaining its greatest breadth at the sixth and seventh marginals. The border from 

 the eighth to the twelfth marginals is sinuous, but not serrated in the adult, although 

 it is so in the young. The posterior margins are shghtly upwardly convergent, 

 forming a very obtuse angle with the sternal portion of the margin of the shell. 

 There is a faint concavity over the anterior angle of the first costal and the hinder 

 half of the first and second marginals, also over the ninth, tenth and eleventh mar- 

 ginals, and between the fourth and fifth vertebrals in the adult. The caudal 

 notch is well developed. The costals are well arched in the female but flatter in 

 the male. In the young and the male, an areolar nodosity occurs near to the 



