332 Dr. J. E. Gray on the Mvd- Tortoises of India. 



Fain. Chitradae. 

 Chitea. 



1. Chitra iiidica. (The Sewteree). 



" Sewteree,^'' Hardwicke, icon. ined. 



Trio7tyx cegyptiaais, var. indicus, Gray, 111. Ind. Zool. i. tab. 80 (copy of 



Hardwicke). 

 Testvdo chitra, Buchanan-Hamilton, icon. ined. 

 Trionyx indicus, Gray, Synopsis, p. 47. 

 Gi/mnopus lineatvs, l)iim<?ril cS: Bibron, Erp. Gen. ii. p. 491. 

 diitra indica, Gray, P. Z. S. 18(i4, figs. 11, 12 (skuU) ; Cat. Shield 



Eept. B. M. p. 70, tab. 41 (skull). 



General Hardwicke observes, " The Seioteree found in the 

 Ganges grows to the size of 240 pounds 5" with a green head and 

 the back of the neck striped. It is described in the ' Supph 

 Cat. Shield Kept.' under the name of Chitra indica. It is 

 known by the eyes being very near the end of the nose, and, 

 according to Hardwicke's figure, by being marked on each 

 side of the pupil with a spot. 



The top of the head and back of the neck are lined. It is 

 different from all the other mud-tortoises in having an elon- 

 gate ovate, very thin skull, with weak jaws, with only a linear 

 alveolar process, 



Hardwicke's figures are copied in Gray's ^ Illustrations of In- 

 dian Zoology ' (tab. x.) under the name of Trionyx cegyjptiacus .^ 

 var. indica. Buchanan-Hamilton had itinhis drawings, figured 

 under the name of Testudo chitra ; in my 'Synopsis of Reptiles ' 

 I defined it as Trionyx indicus ; and in the Tortoises of the 

 British Museum, after examining the skull, I formed it into a 

 genus under the name of Chitra indica^ and figured its skull in 

 the ' Catalogue of Shield Reptiles.' It is the Gymnopus 

 lineatus of Dum^ril and Bibron (' Erp^tologie Generale'), 



Fam. Trionychidse. 



* Sternal callosities four, lateral and postenor ; all broad and well 

 developed in the adult. 



NiLSSONIA. 



Skull rather elongate ; nose shorter than the diameter of the 

 orbit ; alveolar process broader behind ; separation between the 

 alveolar surface and groove in the skull to the inner nostrils 

 narrower, and deeper as well as narrower behind. Alveolar 

 process of lower jaw very broad, especially in front, with a very 

 deep, broad, longitudinal, central impression on the front half ; 

 rather concave on the hinder part of the sides, with a well- 

 marked elevated ridge on the inner margin. 



Skull in the British Museum, presented by Charles Falconer, 



