T R I O N Y X .—Gcoffroy de St. Hilkdre. 



Genus Trionys. — Characters. Shell with a bony disk in the centre, from 

 the sides of which project bony tubercles or ribs; margin cartilaginous, flexible; 

 mandibles furnished with thick lips at the sides; snout prolonged; anterior extre- 

 mities with five fingers, palmate, the three internal furnished with nails; posterior 

 extremities with five toes, palmate, the three internal with nails; tail very short, 

 thick, and conical. 



TRIONYX YER.O'^.—Sclmeider. 

 Plate I. 



Characters. Head elongated, oval, snout greatly prolonged; neck very long; 

 body covered above with a strong cartilaginous shield, entire, with numerous 

 short spines or tubercles on the anterior margin; and several knobs near the 

 posterior border; above umber coloured, marked with irregular dusky blotches; 

 abdomen beautiful white, and marked with numerous red blood-vessels. Anterior 

 extremities with five palmated fingers, the three anterior only furnished with 

 nails; posterior with five toes fully palmated, the three internal with nails. 



Synonymes. a new fresh water Turtle, commonly called Soft shelled Turtle, Phil. Trans, 

 for 1771, vol. Ixi. p. 268, pi. x. figs. 1, 2, 3. 

 Testudo ferox, Schneid., Schildk., p. 330. 



Testudo ferox, Gmel., ed. Syst. Nat. Lin., torn. i. part iii. p. 1039. 

 Soft-shelled Turtle, Bartram, Travels, p. 177. 

 La molle, Lacip., Quad. Ovip., torn. i. p. 136, not the figure. 

 Vol. IV.— 2 



