87 



> 



EMYS TERRAPIN.— Sc^oe^. 



Plate XII. 



Characters. Shell oval, nearly entire, slightly emarginate posteriorly; de- 

 pressed; obtusely carinate; dusky olive-green, or dark brown, and marked vs^ith 

 darker concentric lines. 



SYNONrMES. Testudo terrapin, Schoepff, Hist. Test, p. 64, tab. 15. 

 / La Terrapene, Laciplde, Quad. Ovip., torn. i. p. 129. 



/ Testudo centrata, Latreille, Hist, des Rep., torn. i. p. 145. 



Testudo concentrica, Shaw, Gen. Zool., vol. iii. p. 43, pi. ix. fig. 1. 



Testudo centrata, Daudin, Hist. Nat. des Rep., torn. ii. p. 155. 



Emys centrata, Merrem, Versuch. eines Syst. der Amphib., p. 26. 



Emys centrata, Schweigger, Prod. Arch. Konigsb., vol. i. p. 301, 426. 



Emys centrata. Say, Jour. Acad. Nat. Scien. Phil., vol. iv. p. 205. 



Emys centrata, Fitzinger, Neue Class, der Rep., p. 45. 



Emys centrata, Harlan, Med. and Phys. Res., p. 153. 



Testudo palustris, Leconte, Ann. Lye. Nat. Hist. N. Y., vol. iii. p. 113. 



Emys concentrica. Gray, Synop. Rep., p. 27. 



Emys concentrica, Dumeril et Bihron, Hist. Nat. des Rept., tom. ii. p. 261. 



Salt-water Terrapin, Vulgo. 



Description. The shell is oval, almost entire, or slightly emarginate behind, 

 depressed, and obtusely carinate. The vertebral plates are five in number; the 

 anterior is the largest, pentagonal, with its two shortest margins directed forwards; 

 the second, third, and fourth, are hexagonal, the latter very irregularly so, its 

 posterior margin being much the smallest; the fifth is heptagonal; each of these 



