SOFT-SHELLED TURTLE. 669 



narrow and short; ahonlders bioad, ou a Ubo with anterior portion of oarapax; eyes 

 prominent and almost vertical ; cleft of mouth extending behind the ayes ; shell above 

 with nnmerons minute tubercnlations or depresgions. 



The young differs from the adult by having the shell lighter colored, in some nearly 

 cream, its anterior margin dcntiocdated, the costal plates not separable, and the hard 

 shields of plastron not dlscemable. Length of carapax, 9f inches ; height of carapax, 

 3 inches ; breadth of carapax, 8^ inches ; length of head and neck, 6 inches. 



Habitat, New York, Pennsylvania, Michigan, Ohio, Indiana, Illinois, Wisconsin, Mis- 

 Boari, Iowa, and Montana. 



This species is said to be the most delicious and nourishing as food 

 of any of the Testudinata. They may be caught with a hook, but are 

 usually speared. They are abundant in all the streams flowing into the 

 Ohio and Lake Erie. Dr. Kirtland observed them in calm weather float- 

 ing near the surface of the water, and followed by several Black Bass. 

 The statements about its ferocity vary, probably owing to its having 

 been confounded with Aspidonectes ferox. 

 ^____ ♦ 



Extralimital North American Testudinata, not previensly saentioned in this work. 



Atpidomoies (Paltypeltis, Ag.) ferot, Schweigger. 

 HoLBKOOK, N. A. Herp., ii, p. 11. — Agassiz, Cont. Nat. Hist. U. S., i, p. 401. 



Ilabitat, Georgia, Florida, Alabama, Mississippi, and Louisiana. 

 Aspidonectes asper, Agassiz. 

 Agassjz, Cont., 1, p. 405. 



nabitat, Mississippi and Louisiana. 



Aspidonectes nucTwlis, Agassiz. 

 Agassiz, Cont., i, p. 506. 



Habitat, Cumberland and Upper Tennessee Eivers. 



Aspidonectes emoryii, Agassiz. 

 AG.48S z, Cont., i, p. 407. 



Habitat, Texas. 

 Aromoclelys carinatus {Gonioohelys triquetra, et minor, Ag.) Gray. 



Agassiz, Cont., Nat. H)8t., U. 8. p. 423.— U. 8. Geolog. Surv., 100th Meridian, voL v., 



p. 582. 

 Habitat, Missouri to Louisiana, Texas, and Arizana. 



Cinosternum sonoriense, LeConte. 

 Proc. Acad. Nat. 8ci. PhUa , 1854, p. 184.— U. S. G«olog. Surv., ICOth Meridian, v., 5, 

 p. 89.— Agassiz, Cont., Nat. Hist, U. 8,, i, p. 428. 



Habitat, Arizona and Mexico. 



Cinostei-num integrum, LeOodte. 

 Prac. Acad. Nat. Soi., PhU., 1854, p. 183.— Agassiz, Cont. Nat. Hist. U. 8. 1, p. 430 . 



Habitat, Mexico. 



