TRIONYX. 47 



cimens has a few rudimentary bones opposite the third, fourth, 

 and fifth ribs. See Cuv. Os. Fos. v. 202. 



4. Trionyx Indicus, [Indian Trionyx.) — ^Testa supra sub- 

 convexa oHvaceo viridi, Hneis irregularibus tortuosis vel 

 furcatis nigro marginatis ornata, sterno 4-calloso, callis late- 

 rahbus quadrangularibus, posticis longe triangularibus, cauda 

 brevi. 



^' Trionyx Egyptiacus, Var. hidicus., Hard. lUust. 



« Ind. Zool. t. Testudo Chitra, Hamilton, Icon. Ined. 

 (v. Icon. Mus. Ind.) 



Habitat, in India, fl. Ganges, Penang, Dr. Henderson, 

 (v. Mus. Col. Surg.) 



Sometimes weighing 240 pounds. The lateral callosities , 

 are four-angular, and of nearly equal width at each end ; 

 their inner extremity is obliquely truncated in front ; the 

 hinder callosities are parallel, long triangular, with the outer 

 side slightly rounded. 



5. Trionyx Hiirum, [Hurum Trionyx.) Testa supra ob-^^ \ f^ 

 scure fusca, capite viridi nigro reticulato, fronte macula C 

 unica temporibusque duobus luteis ornatis ; sterno luteo, 



" 4-calloso, caUis lateralibus quadrangularibus angulo postico 

 interno oblique truncato, posticis oblique ovato -triangu- 

 laribus. 



Tesludo Hurum, Hamilton, Icon. Ined, (v. Icon. Mus. 

 Ind.) Cop. Trionyx Hurum, lUust. Ind. Zool. t. Var.? 

 Trionyx Gangeticus, Cuv. Os. Fos. v. 222, note; t. 12, 

 f. 46, f. 42, f. 4, f. 9 ; t. 1 1, f. 5-8 ; t. 12, f. 14, f. 21, 22, 

 f. 31,33, f. 38,f. 41. (Anat.) 



Junior. Dorso maculis 4 vel 6, pupillis nigris notatis, 

 capite supra nigrescente luteo maculato, cauda sublonga. 

 Testudo Chim, Hamilton, Icon. Ined, (v. Icon. Mus. Ind.) 



Pullus ? Obscure viridi nigro reticulata, dorso maculis 

 4 rotundatis annulo rufo circumdatis ornato, marginibus 

 luteo-maculatis, capite nigrescente vertice fiavo punctato, 

 sterno non calloso. Testudo ocellata, Hamilton, Icon. 

 Ined. (v. Icon. Mus. Ind.) cop. lUust. Ind. Zool. t. Trionyx 

 Gangeticus, Cuv. Guerin. Icon. t. 1, f. 6? Var. maculis 

 dorsi 5. 



Habitat in Indiae fiuvio Ganges, General Hardwicke et 

 Dr. Hamilton. 



Cuvier's specimen appears to have a peculiarity in the web 

 between the 2nd and 3rd fingers of each foot being pierced 



