TRIONYX. 47 



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

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



4. Tr'ionyx Indiais, {India?!. Trionyx.) — Testa supra sub- 

 convexa ohvaceo viridi, Hneis irregularibus tortuosis vel 

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

 raUbus quadrangularibus, posticis longe triangularibus, cauda 

 brevi. 



Trionyx Egyptiacus, Var. Indicus., Hard. Illust. 

 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 Huriim, [Hurum Trionyx.) Testa supra ob- 

 scure fusca, capite viridi nigpo reticulato, fronte macula 

 unica temporibusque duobus luteis ornatis ; sterno luteo, 

 4-calloso, callis lateralibus quadrangularibus angulo postico 

 interno oblique truncato, posticis oblique ovato-triangu- 

 laribus. 



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

 Ind.) Cop. Trionyx Hurum, Illust. 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.) 



Pidlus ? Obscure viridi nigro reticulata, dorso maculis 

 4 rotundatis annulo rufo circumdatis ornato, marginibus 

 luteo-maculatis, capite nigrescente vertice flavo punctato, 

 sterno non calloso. Testudo ocellata, Hamilton, Icon. 

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

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

 dorsi 5. 



Habitat in Indise 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 



