51 



ORYPTODIEA. 



CHELONIIDAE. 



Thalassochelys, Fitz. 



Thalassochelys caouana, Linu. ; Holbrook, N. Am. Herp., ii, p. 33. En- 

 tire Atlantic coast. 



Eretmochelys, Fitz. 



Eretmochelys imbricata, Linn. ; Holbrook, N. Am. Herp., ii, p. 39. South- 

 ern Atlantic coast. 

 Eretmochelys squamata, Linn. ; Agassiz, Cont. Nat. Hist. U. S., i, p. 382. 



Pacific coast. 



Ohelonia, Brong. 



Chelonia mydas, Schw. ; Holbrook, K. Am. Herp., ii, p. 25. Atlantic 

 coast south of Long Island. 



Chelonia virgata, Schw. ; Agassiz, Cont., i, p. 379. Pacific coast. 



TRIONYCHIDAE. 



Amyda, Agassiz. 



Amyda mutica, Lesueur, Mem. du Mus. d'Hist. Nat., xv, p. 263. Middle 

 and northern tributaries of the Mississippi, and the Saint Lawrence. 



ASPIDONECTES, Wagl. 



Aspidonectes ferox, Schweigger; Holbrook, N. Am. Herp., ii, p. 11 

 Georgia to Western Louisiana. 



Aspidonectes spmifer, Lesueur, Mem. de Mus. d'Hist. Nat., xv, p. 258. 

 Middle and northern tributaries of the Mississippi, and Saint Law- 

 rence. 



Aspidonectes asper, Agassiz, Cont. Nat. Hist. U. S., i, p. 405. Lower 

 Mississippi tributaries. 



Aspidonectes nuchalis, Agassiz, Cont. Nat. Hist. U. S., i, p. 406. Cumber- 

 land and Upper Tennessee Rivers, Tennessee. 



Aspidonectes emoryi, Agassiz, Cont. Nat. Hist. U. S., i, p. 407. Texas. 



CHELYDRIDAE. 



Chelydra, Schw. 



Chelyd.ra serpentitm, Linn. ; Holbrook, N. Am. Herp., i, p. 139. From 

 Canada to Ecuador. Wanting in the Pacific subregion. 



