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P. Cantorii, Gray. 



Chitra Indica, Gray. Giinther, I. R. form only the colours 



and marking form a life-drawing of GJdtra, Sup., Cat. 



S. R., p. 91. 



Dissimilar as are the proportions of the skulls of this species 

 and CJdtra, they are extremely alike externally. It is a very 

 much smaller animal however, but specimens are scarce in 

 collections. 



Inhabits Arakan, Calcutta, Allahabad, "Malacca" (Cantor). 



Family Trionycid^. 

 Fresh water Chelonians with three claws on all feet and 

 powerful lower jaws. Carnivorous. Eggs, globular, calcareous. 



Trionyx, Geoffroy. 



Shell depressed. Sternum united to thorax by cartilage. Sternal 



callosities in adults five, the anterior lunate one, only being 



developed in aged individuals.* Young either 'ocellated' or 



otherwise handsomely marked, which marks disappear with age. 



T. Gangeticus Cuv. Reg. Anim. 



T. hururti, Buck. Ham. and Gray. 111. Ind. Zool. 



T. gatajhal, Buck. Ham. 



T. Javanicus, Gray. 111. Ind. Zool., vide Anderson in Annals 

 and Mag., N. H., May 1872 and September, p. 221. 

 This species is somewhat variable in its colour, and varies from 

 light to dark green or greenish olive of various shades. The 

 head is marked by radiating black lines, or by less regular 

 anastomosing lines (as in Buchanan Hamilton figure of ' Hurum') 

 and is handsomely ocellated when very young, though young 

 specimens are not so common as might be expected from the 

 numbers of adults brought for sale to the bazaars. The skull is 

 very stout and with a short facial profile. The palate broad and 

 sunken with parallel sides, and the mandible with a very feeble 

 median tubercular ridge on the inside, with two marked ridges 



* Homolog'ous to the so called ' sternal pair.' Sup., Cat. S. R., p. 1>G of Lande- 

 mannia ; the granulations occasionally spreading from two lateral points. 



