20 EMYS. 



More depressed than the other species. M.OppelJn (1811) 

 remarked the fact of the sternum being moveable, and it has 

 since been observed by Schweiger, Bojanus, and Mr. Bell. 

 For the Anatomy of this animal consult Bojanus's beautiful 

 and accurate Work. 



Gen. 2. EMYS, (Terrapin). 



Sternum dilatatum solidum, antice truncatum postice bifi- 

 dum, persymphysinosseamcum testa conjunctum, scutella 12. 



This genus only contains part of the Emijdes of former 

 authors, it being limited to those Terrapins which have the 

 sternum united to the back shell by a bony symphysis, and 

 covered with six pairs of bony shields. The symphysis is 

 generally about \ the length of the sternum, covered by the 

 outer sides of the pectoral and abdominal shields, and fur- 

 nished with small and partly exposed axillary and inguinal 

 plates; the margin is always covered with 12 pairs of plates 

 and a small nuchal one. 



A. Testa margine acute dentato, sterni laterilus rotundatis. 

 Orbis Veteris Incolte. 



1. Emys spinnsa, {Spinous Terrapin.) — Testa (pulli) 

 suborbiculari depressa pallide fusca dorso obtuse carinato, 

 margine explanato acute dentato, areolis punctatis spinis 

 centralibus armatis, sterno pallide fusco brunneo radiato. 



Eniys spinosa, Bell. Mss. (v. Mus. Nost.) Gray, lUust. 

 Ind. Zool. ii. t. f. 1. 



Habit, apud Penang. Capt. Hay, 



A large species only known from two specimens in a very 

 young state, 4^ inches long and broad. The back is fur- 

 nished with a broad flattened central keel, and the margin is 

 deeply dentated and serrated all round. 



2. Ejnys Dhor, {Dhor Terrapin.) — Testa (pulli) subor- 

 biculari depressa, fusca nigro punctata, dorso obtuse cari- 

 nato, margine explanato postice acute dentato, areolis mag- 

 nis punctatis ; animal nigrescens lateribus colli gutturisque 

 aurato-lineatis, pedibus aurantio maculatis. 



Emys Dhor. Gray, lUust. Ind. Zool t. , (v. Mus. Brit.) 

 Emys Hasselti, Boie Mss. (v. Mus. Leyd.) 



Habitat in Bengal, called Dhor and Thum, General Hard- 

 wicke, Java, Van Hasselt. (v. v. Hort. Bell et nost.) 



Like the former, only known from three young specimens. 



