212 Mr, Gray on the Genera of Reptiles, [Sept. 



C. fimbriata. Testudo matamata, Brug, 



This genus is allied by its soft lips to the next family. 



§ 11. Feet and head not or onlif partly retractile into the cara- 

 pace; carapace mostly soft, Gymnopodi. 



Fam,\l\, Trionicid;e. 



Body covered with a coriaceous skin ; lips fleshy ; feet digi- 

 tate palmate ; five toed, three clawed. Fluviatile, 



1. Trionix, Geoff, 

 - Nose produced. 

 T. ferox, Geoff ^ Testudo ferox, Pennant, 



Fam.iy, Spiiargid;e. 



Body covered with a coriaceous skin ; Hps horny ; feet fin- 

 shaped. Marine, 



1. Sphargis, Merrem 



S. mercurialis, Merrem. Testudo coriacea, Liu, Luth, 

 Daubenton, 



Fam.y, Cheloniad^. 



Body covered with horny shields; lips horny; feet fin-shaped. 

 Marine, 



]. Ch ELONi A, Brog;/. Caretta, Merrem, 



C. Mydas. Testudo Mydas, Lin, Caretta cephalo, Merrem, 



A Table of the Affinity of the Orders of Reptiles. 



Norma} Groups, Anneciant Groups. 



Order I. — Sauri, 



1. StellionidaB. 3. Lacertinidee. 



2. Geckotidae. 4. Chamselionidae. 



5. Tupinambidae. 



Order II. — Emydosauri, 

 1. Crocodilidaj. 3. Plesiiosauridge. 



2. ? 4. Icthiosauridee 



5. ? 



Order lll.^Chelonii, 



1. Testudinidse. 3. Trionicidde. 



2. Emydidae. 4. Sphar^idic. 



5. Carettidae. 



Order IV. — Ophidii, 



1. Crotalidae. 3. Hydridai. 



2, Viperidae. 4. Colubridae. 



5. Boid«. 



