428 



AMERICAN TESTUDINATA. 



Part II. 



one as the jaws shut. These edges are sharp in both jaws. Fish and Coleopte- 

 rous insects were found in the intestines of two specimens examined immediately 

 after their capture ; the Fish in the one, and the insects in the other. The spe- 

 cies of this genus have, to this day, been associated with the genuine Cinoster- 

 nums of Central and South America ; but the characters indicated above show 

 them to differ generically. 



I know three species of this genus, one of which has long been known under 

 the name of Testudo pennsylvanica ; the others were first described by Wagler^ 

 Gray, Dumeril and Bibron, and Major LeConte, luider the names of Ciu. hirtijjes, 

 Wdf/l.,^ Cin. oblongum, Qrayf Cin. Doubledayii, Grai/^ Cin. leucostomum, Dmn. and 

 Bibr.^ Cin. integrum, LeC.^ and Cin. sonoriense, LeC.;^ but these species are by no 

 means all distinct. 



Thykosternum pennsylvanicum, Ag.^ The young are represented PI. 4, fig. 7-12, 

 and PI. 5, fig. 16 and 17 ; and the eggs, PI. 7, fig. 1-6, under the name of 

 Cinosternum pennsylvanicum. Cinosternum oblongum Gray is only a male, and 

 not a distinct species. Dr. Nott has sent me a specimen with a double row of 

 median scales along the back. This is the only instance of an anomaly I have seen 

 in the scales of any Cinosternoid. The geographical range of this species . is very 

 extensive. It occurs from Pennsylvania to Florida, and westward to the Missis- 

 sippi valley. I am obliged to Dr. Nott for specimens from Pensacola and Mobile, 

 and for others to Mr. Albert Stein, from the last locality. Dr. Benedict and Mr. 

 T. C. Copes have sent me large numbers from the neighborhood of New Orleans. 



Thyrosternum sonoriense, Ag. The young are represented PI. 5, fig. 8-11, under 

 the name of Cinosternum sonoriense, Lc C. This species has thus far only been 

 found in Mexico, but so near upon the borders of the United States that it 

 deserves to be noticed here. Tucson, in Sonora, is the locality whence Dr. J. 

 LeConte obtained the sjDecimen described by his father.^ Others from the same 

 locality, and from, - Guadalupe Canon, also in Sonora, are in the possession of 

 the Smithsonian Institution. 



1 Syst. Amph., p. 137, tab. 5, fig. 29 and 30 ; 

 Descr. et Icones, pi. 30. 



2 Cat. Brit. Mus., p. 33. 



» Arch. Mus., 1852, vol. 6, p. 239, pi. 17. 



^ Proc. Acad. Nat. Sc, Phil. 1854, p. 183. 



6 Ibid. p. 184. 



' This is the Cinosternum pennsylvanicum of mod- 

 ern authors, (comp. Dum. and Bibr., Erp. gen., vol. 

 2, p. 367, and Holbrook, N. Am. Herp. p. 367,) called 

 also Terrapene pennsylvanica, Cistudo pennsylvanica, 



Emys pennsylvanica, and Testudo subrufa. I have 

 not the slightest doubt that the Testudo tricarinata, 

 Setz, in SchopflF's Hist. Test., (Daudin's Testudo 

 Retzii,) which is generally referred to Cinosternum 

 scorpioidcs on account of the dorsal keels, is the 

 young of this same species. A comparison of my 

 figures (pi. 4, fig. 7-9) with Schopff 's pi. 2, fig. 1-3 

 will satisfy the most skeptical. SchopflT's figures rep- 

 resent a specimen two years old ; mine were recently 

 hatched. 



