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EMYS GEOGRAPUlCA.—Lesueur. 



Plate XIV. 



Characters. Shell sub-oval, flattened, carinate, serrated posteriorly; dark or 

 olive-brown, reticulated with reddish-bro-svn lines; sternimi oblong, deeply emargi- 

 nate behind, dingy yellow; head very large; jaws entire. 



Synontmes. Testudo geographica, Lesueur, Jour. Acad. Nat. Scien. Phil., vol. i. p. S5, 

 pi. v. 

 Testudo geographica, Leconte, Ann. Lye. Nat. Hist. N. Y., p. lOS. 

 Emys geographica, Harlan, Med. and Phys. Res., p. 152. 

 Emys geographica, Dumeril et Bihron, Hist. Nat. des Rept., torn. ii. p. 257. 



Description. The shell is sub-oval, slightly emarginate in front, serrated 

 behind, and flattened above, with a marked carina throughout its whole extent. 

 The vertebral plates are five in number and smooth; the first irregularly hexagonal, 

 with its posterior border curved and projecting into the anterior margin of the 

 second plate, which is also hexagonal, with its anterior margin excurvated; the 

 third and fourth plates are hexagonal, with their lateral angles acuminate; the 

 latter with a deep sinus on its posterior face for receiving the fifth plate, which is 

 heptagonal. The first lateral plate is triangular, with its basis rounded and 

 connected with five marginal plates; the second and third are hexagonal, with an 

 acute angle above, passing in between the vertebral plates; the fourth is pen- 

 tagonal: all these plates are smooth above and have only a few longitudinal 

 wrinkles near the marginal plates. Of the twenty-five marginal plates, the nuchal 

 or intermediate is triangular, with its apex pointing forward, and marked with 

 three minute teeth, and its basis backward and having an angular depression for 



