ORDER OPHIDIA. 



yellow ring placed across the sutures of the vertebral plates ; 

 beneath pale brown, varied with darker brown. ( ^ ?) 



III. Sternum united to the hack shell by a horny suture ; 

 before rounded, behind rounded, or slightly nicked, 

 divided by one or two cross sutures ; sternal plates^ eleven 

 gular pair united. Kinosternon. Spice. 



Three-keeled Kinosternon. E. {Kinosternoii) Scorpoides. 

 Test. Scorpoides, Lacep. Test. Tricarinata, Daud. Ki- 

 nosternon Shavianum, Bell. Kin. Longicaudatum, Spix, 

 t. 12 ? Shaw Zool. t. 15. Jun. Test. Retzii, Daud. 

 Shaw, t. 11. 



Shell oblong, olive polished, rather compressed three- 

 keeled, keels continued, dorsal shields long, hexangular, sub- 

 imbricate ; sternum as broad as the opening of the shell. 

 South America. 



Three Ridged Kinosterncn. E. (Kinosternon) Triporcata, 

 Gray. Terrapena Triporcata, Wiegmann, Mus. Berl. j 



Shell, oblong, olive, with three very high compressed ridges ; 

 sternum cross shaped, very narrow ; the largest species of 

 the genus. 



Pennsylvanian Kinosternon. E. (Kinosternon) Penn- 

 sylvanica. Test, Pennsylvanica, Bosc. Test. Subrufa, 

 Lacep. Edw. t. 287* Var. Test. Glutinata, Daud. 

 Test. Boscii, Merrem. 



Shell oval, brown ; dorsal shields, flattened ; sternum, 

 rather narrower than the opening of the back shell ; behind 

 nicked. North America. 



Musky Kinosternoni E.. {Kinosternon) Odoratum. Test. 

 Odorata, Bosc. Cistuda Odorata, Say. Sternotheros 

 Odoratue, Bell. 



Shell ovate, keeled ; sides declivate ; sterniun very narrow ; 



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