19 13.] N. AnnandaItE : Tortoises of Chota Nagpnr. 73 



Length of skull (to occipital condyle) 



Zygom.atic breadth of skull 



Length of orbit 



Height of nasal aperture (skull) 



Breadth of nasal aperture { ,, ) 



Interorbital breadth 



Breadth of lower jaw (at symphysis) 



In measuring the height of the male carapace I have not 

 included the concavity of the plastron but have measured from 

 the surface on which the shell rested to its highest point. The 

 greatest depth of the concavity is about 20 mm. 



This species is closely allied to G. trijuga and it is not improb- 

 able that confusion has occurred in the case of immature tortoises. 

 Apart from the incompleteness of the temporal arch, there are 

 apparentl}' constant differences in the skull, and the shape of the 

 carapace is different, although it is difficult to bring out this 

 difference by means of measurements. One of our specimens was 

 examined by the late Dr. J. Anderson, who apparently thought 

 that there was some mistake about the label, but the capture of 

 a second specimen from the same district makes this improbable, 

 as there is no evidence against the authenticit}' of the recorded 

 history except the fact that no other individual was known from 

 that district. The first specimen was taken by the late Dr. V. Ball. 



\>ry little is known of the habits of this species. i\Ir. Chau- 

 dhuri, who obtained the male specimen in our collection through 

 Mr, B. C. Sen, I.C.S., from the Hos, an aboriginal tribe of Chota 

 Nagpur, tells me that they regard it as a land tortoise. The female 

 living in the rooms of the Bombay Natural History Societ3'- was, 

 however, taken in a shallow tank, and I detected on its shell the 

 remains of a colony of the polyzoon Plwnatella , which cannot live 

 long out of water. It is not improbable that tortoises of the species 

 visit water in hot weather, but live habitually, without actually 

 entering water, in damp places. The Bombay- female laid several 

 eggs in April and March and did not at that time of j^ear show 

 any inclination to enter water. The eggs were 148 mm. long by 

 30 mm. in transverse diameter. 



Geoemyda tricarinata, Blyth. 



Geoeuiyda tricarinata, Blyth, Jotirn. As. Sac. Bengal, 1856, p. 714; 

 Theobald {Chaibassia), Cat. Rept. Brit. Ind., p. 7 (1876) ; 

 Anderson [Chaibassia), Anat Zool. Res. Ytinnan, p. 718 

 (1879); Boulenger [Chaibassia), Cat. Chel., p. 139 (1889); 

 Lydekker (A'z'con'a), Journ. As Soc. Bengal, 1889, pp. 327, 330, 

 fig. I ; Boulenger [Nicoria), Fauna, p. 28 (1890) ; Siebenrock 

 [Geoemyda) , Zool. Jahrb. SuppL, x. Heft 3, p. 497 (1909). 



Chaibassia theobaldii, Anderson, op. cit.^ p. 718; Boulenger, C«/. 

 Chel., p. 140. 



