10 TRIONYXFEROX. 



Testudo ferox, Schoepff, Hist. Test., p. 88, f. xix. 



Testudo verucosa Bartrami, Schoepf, Loc. Cit., p. 90. 



Testudo ferox, Latr., Hist. Nat. Rept., torn. i. p. 165. 



La Tortue de Pennant, Daud., Hist Nat. des Rept., torn. ii. p. 69. 



Testudo Bartrami, Daud., Loc. Cit., p. 74. 



Testudo ferox, Shaw, Gen. ZooL, vol. iii. part i. p. 64, pi. xvii. fig. 1. 



Trionyx Georgicus, Geoff., Ann. Mus., torn. xiv. p. 7. 



Trionyx Bartrami, Geoff., Loc. Cit., p. 18. 



Trionyx ferox, Schweig., Arch. Konigsb., vol. i. p. 285. 



Trionyx ferox. Men:, Neue, Class, de Rept., p. 20. 



Trionyx ferox, Say, Jour. Acad. Nat. So. Phil., vol. ii. p. 203. 



Trionyx spiniferus, Lesueur, Ann. Mem. du Mus., tom. xiv. p. 258, pi. vi. figs, a, b. 



Testudo ferox, Leconle, Ann. Lye. Nat. Hist. N. Y., vol. iii. p. 93. 



Aspedonectes ferox, TViigler, Nat. Syst. der Amph., p. 1 34. 



Trionj-x ferox, Gray, Synops. Rept., p. 43. 



Trionyx ferox, Harl., Med. and Phj^s. Res., p. 158. 



Gymnopus spiniferus, Durn. et Bibr., Hist. Nat. des Rept., tom. ii. p. 477, pi. xxii. fig. 1. 



Soft-shelled Tortoise, or Soft-shelled Turtle, Vulgo. 



Description. The shell is suboval, larger behind, entire, ecarinate, greatly 

 depressed, and smooth above, except where some tubercles are situated on its 

 posterior soft portion. These tubercles are small and disposed in rows, and 

 reach from the margin to the circumference of the bony disk. At the anterior 

 border are seen a number of pointed or conical tubercles; many of them are 

 almost horny at the tip. 



The sternum is oval, entire, and full in front, extending even beyond the cara- 

 pace; its anterior part is cartilaginous and movable, and can be drawn upwards 

 at the will of the animal, so as to touch the shell, and thus conceal the head when 

 retracted. Posteriorly the sternum is also entire, but smaller, and much less 

 extensive, leaving the extremities completely exposed. 



The head is large, elongated oval, with the forehead considerably elevated, 

 and the snout small, cylindrical, and greatly prolonged. The nostrils are anterior 



