EMYDA. 49 



Doubtless a distinct species ; but it requires to be more 

 fully described. The back differs from that of the other 

 species in shape, being ovate, and narrow in front. 



Trionyches Fossiles, Cuv. Os. Fos. v. 221. 



a. Tr. Parisiensis. Tr. des Platrih-es de Paris. Cuv. 

 Os. Fos. V. iii. 329, v. 222. Fossil in the Gypsum pits 

 of Paris. 



h. Tr. Manouri. Tr. Maiioiir, Bourdet, Mem. Tr. des 

 Pktri^res d'Aix. Cuv. Os. Fos. v. 223, t. 15, f. 1, 2. 



c. Tr. LaurillardU. Tr. des 3Iolasses de la Gironde. Cuv. 

 Os. Fos. V. 224, t. 15, f. 3; viii. t. 76, f. 9. Size of the 

 Nilotic Trionyx. 



d. Tr. Aynansii. Tr. des graviers de Lot et Garonne. 

 Cuv. 1. c. V. 221. 



e. Tr. Dodunii. Tr. des graviers de Castelnaudarij. Cuv. 

 Os. Fos. V. 221. 



f. Tr. Lockardi. Tr. des Sables d'Avaray. Cuv. Os. 

 Fos. v. 227. 



Gen. 2. EMYDA. {Emyda.) 



Margo dorsi cartilaginea ossibus marginalibus sus- 

 tentata. Pedes retracti valvulis e margine sterni ortis 

 inclusi. Sternum latum. 



The margin of the dorsal shield is supported by a series of 

 small bones in the front and hinder extremity, similar to 

 the bones of the margin in the other tortoises ; and the 

 sternum, which has each of the bones of which it is com- 

 posed furnished with callosities, is also provided with valves 

 or flaps on the edges of the sides over the legs, which they 

 quite hide from view when the animal is withdrawn within 

 the shell. 



1. Emyda punctata, [Punctured Emyda.) — Scutellis ob- 

 scure viridibus, occipite maculis duabus albis ornato, sterno 

 7-calloso callis postice unitis. 



Test, punctata, Lacep, t. 7, f. 1, (v. Mus. Par.) cop. 

 Test, scahra, Latr. and Chagrined Tortoise, Test, gra- 

 nulata, Shaw, iii. t. 14, et Enc. M. t. 6, f. 4, et Daud. 

 Rept. iii. t. 19, f. 2. Test, granosa, Schoepf, t. 30, f. A. B. 

 Trionyx Coromandelicus, Geoff. Ann. Mus. xiv. t. Anat. 



H 



