G. cnRTSBMTs. 79 



blackish spot or concentric rings : the markings on the bridge 

 usually conriucnt into a longitudiiuil fii^airc. 



Kansas, Illinois, and Ohio to tho Gulf of Mexico and the llio 

 Grande. 



a. 2 , spir. Ohio. 



h. 2 , spir. Wa,shinp:ton, Miss. Smithsonian Inst. [P.J. 



c. Shell. ^N'asliingtou, Miss. Smithsouiau Inst. [P.J. 



d, e. (S & yg., stfEd. Louisiana. 



/. Ilgr. shell. Louisiana. (Typo of Umi/s hulhrooJcii.) 



g. Yg., spir. New Orleans. 



h. Yg., spir. IMatamoros, Mexico. Smithsonian Inst. [P.]. 



i. Yg., spir. N.America. Dr. J. E. Gray [P.]. 



(Type of Emys samjuinolentn.) 



k. 2, spir. N.America. (Ty^Q oi Trachemys lineata.) 

 I, m, 71, o, p, q, r,s. c? > $ > N. America. 



hgr., & yg. stti'd. 



t. 5 , skel. N. America. 



Var. rugosa. 



PTestudo palustris, Gmcl S. N. i. p. 1041 (1789). 



Testudo rugosa, S/iaw, Zool. iii. p. 28, pi. iv. (1802). 



Emys decussata, Gray, Syii. liept. p. 28 (1831); Bell, Test.-^. — , 

 pis. — (1842) ; Bum. ^- Bibr. ii. p. 279 (1835) ; Cocteau, in Sayra, 

 Hist. Cuba, Bept. p. 0, pi. i. (184-3); Gray, Cat. Tort. p. 24 

 (1884) ; Reink. ^- Lutk. Vid. Meddel. 1862, p. 290. 



■- rugosa, Gray, Syn. Bept. p. 30; Dum. ^- Bibr. p. 284; Cocf. 



I. c. p. 11, pi. ii. ; Gray, Cat. Tort. p. 24, and Sh. Bept. i. p. 31 

 (1855) ; Gtindlach, Bep.fs.-iiat. Cvba, ii. p. 104 (1868) ; Vilar6,t. c, 

 p. 119; Soicerby ^- Lear, Tort. pis. xlii., xliii. (1872)'. 

 — vermiculata, Gray, Cat. Tort. p. 25, and Sh. Bept. i. pi. 



xii. D. 



Ptychemys decu.s.'^ata, Ayamz, Contr. N. H. U. S. i. p. 434 (1857). 

 Clemmys decussata, Straucli, Chelon. Stud. p. 33 (1862), and Verth. 

 Schildkr. p. 81 (18C5). 



rugosa, Strauch, Verth. Schildkr. p. 81. 



Emys jamao, Vilaro, I.e. p. 121 (1868). 



Pseudemys decussata. Gray, Suppl. Cat. Sh. Bept. i. p. 46 (1870). 



Trachemys rugosa. Gray, I. c, p. 48. 



In this form, which varies greatly as to the degree of convexity 

 of the shell, the bright bands on the soft parts have a tendency to 

 disappear, or disappear entirely and are replaced by black marblings. 

 The carapace may be uniform brown or olive, or blotched or mar- 

 bled witli black, the blotches sometimes following the borders of 

 the shields ; plastron yellowish, uniform or blotched or vermiculated 

 with blackish, or with symmetrical sinuous or annulate dark 

 markings ; in some specimens black bands follow the sutures 

 between the shields. 



Length of shell 28 centim. 



West Indies (Cuba, Jamaica, San Domingo, Porto llico, Guade- 

 loupe, Martinique). 



a. 5 , stffd. S. Domingo. 



6. ($, skel. S. Domingo. 



c. § , skel. S. Domingo. Paris Museum [E.]. 



