1. TKIONYX. 259 



13. Trionyx ferox. 

 Pennant i^ Garden, Phil. Tr. Ixi. p. -IW), pi. x. fi<,'s. 1-;J (1771). 

 Testudo ferox, Schneid. Schildkr. p. 330 (1783) ; Schoepff, Test. p. 88, 



pi. xix. (1792) ; Baud. liept. ii. p. GO (1802). 



verrucosa, Schoepff, I, c. p. 90. 



? Testudo bartranii, Baud. I. c. p. 74. 



Trionj-x cariiiatu8, Gcofr. Ann. Mm. xiv. p. 11, pi. iv. (1801)). 



georgicus, Geofr. I. c. p. 17. 



ferox, Schweif/ff. Prodi: p. 15 (1814). 



brongnartii, Sclnoeigg. I. c. p. 18. 



ferox, part., Leconte, Ann. Lye. N. Y. iii. p. 93 (1830); 



Ilolbr. N. Am. Her p. ii. p, 11 (1842); Gray, Cat. Tort. p. 49 



(1844), and Sh. Rept. i. p. G8 (1855); Str'auch, Chelon. Stud. 



p._ 173 (1862), and Verth. Schildkr. p. 122 (1SG5). 

 ? Triouyx bartrarai, Leconte, I. e. p. 9G. 

 Gvmnopus spinilerus, part., Du77i. 4'- Hibr. ii. p. 477 (1^35). 

 ^' ■ '- ^ ■ -^ ■ - - - - . ^^^3 



eop.-Carol. xxxii. i. p. 48 

 (I860). - • I 



Platypeltis ferox, part., Gray, Proc. Zool. Soc. 1873, p. 58. 



Costal plates normally seven pairs ; a single neural between the 

 first pair of costals ; plates rather coarsely pitted and vermiculate. 

 Dorsal disk of young smooth, or with small scattered tubercles, 

 without well-marked longitudinal ridges ; a series of conical tubercles 

 on the nuchal border. Epiplastra widely separated from each other, 

 short ; entoplastron forming a right angle ; plastral callosities well 

 developed, hyo-hypoplastral and xiphiplastral. Head moderate ; snout 

 (on the skull) a little longer than the diameter of the orbit; inter- 

 orbital space hardly half the diameter of the orbit ; postorbital arch 

 narrow ; mandibular symphysis shorter than the diameter of the 

 orbit. Olive above, with scattered small round black spots or dots ; 

 young with a pale black-edged border to the dorsal disk ; a light, 

 black-edged streak on each side of the head, passing through the 

 eye, uniting with its fellow on the snout, just in front of the orbits ; 

 limbs spotted and marbled with black. 



Length of dorsal disk 42 centim. 



S.E. United States, from Georgia to Western Louisiana. 



a. Ad., stffd. Georgia. Royal Society [P.]. (Type.) 



b. Hgr., stfta. Louisiana. W! P. Smith [C.J. 



c. d. Ad., stffd., skull N. America. W. P. Smith [C.]. 

 separ., and yg., stffd. 



e. Yg., spir. N. America. 



14. Trionyx spinifer. 



Trionj'x spiuiferus, Lesueur, Mem, Mus. Paris, xv, p. 258, pi. vi 

 (1827). 



ferox, part., Leconte, Ann. Lye. N. Y. iii. p. 93 (1830) ; Holhr. 



N. Am. Herp. ii. p. 11, pi. i. (1842) ; Gray, Cat. Tort. p. 49 

 (1844), and Sh. Pept. i. p. 68 (1855); Strauch, Chelon. Stud, 

 p. 173 (1862), and Verth. Schildkr. p. 122 (1865). 



T 



