CLASS REPTILIA. 



III. Hinder part of dorsal shell mobiles united to the ante- 

 rior by a carious ligamentous suture; sternum solid, 

 shields twelve. Kinyxis. Bell. 



Homer's Tortoise. Test. {Kinyoeis) Homeana. Bell. 

 Lin. Trans, xiv. t. f. 2. 



Shell brown ; hinder edge reflexed ; vipper edge of fifth ver- 

 tebral plates prominent ; nuchal shield long, narrow ; front of 

 sternum expanded. Demerara. Guadaloupe. 



Bells Tortoise. Test. {Kinyxis) Bellianay Gray. 



Shell brown, edge hardly expanded ; centre of hinder verte- 

 bral plates convex ; nuchal shield long, narrow ; front of 

 sternum, narrow. Inhab. ? — Mus. Gray. 



Worn Tortoise. Test. (Kinyxis) Erosa. 



Shell brown ; hinder edge reflexed, denticulated ; centre of 

 fifth vertebral plates prominent ; nuchal shield none. Young, 

 back rounded. K. Castanea. Bell. 1. c. t. f. 1. Test. 

 Denticulata, Shaw. Zool. t. 13. Test. Erosa, Schw. Inhab. 



IV. Dorsal shell solid; front lobe of sternum mobile. 



Pyxis. Bell. 



Radiated Box Tortoise. Test. (Pyxis) Aranoides, Bell. 

 Lin. Trans, xv. t. 1 6. 



Shell hemispherical, varied black and yellow; length 6, 

 breadth 4 inches. Inhab. 



Genus II. Emys. 



Feet palmated ; claws five— four, sharp ; nostrils pervious; 

 jaws homy ; shell polid, covered with horny plates, marginal 

 plates twenty-three or twenty-five, hinder pair free ; sternal 

 shields eleven or twelve ; neck retractile ; pelvis only attached 

 to the vertebra. 

 6 



