TIIK RKPTILF HOOK 



PLATE XXVIII 



O 



O 



O o 







O 



o 



SPINY SOFT-SHELLED TURTLE, Trionyx spinifer 

 The sp>ecinien figured is half-grown. At maturity the ring-like markings become quite obscure. Abundant in the Central States 



SPINY SOFT-SHELLED TURTLE, Trionyx spiniftr 

 The plastron is soft and easily lacerated if the turtle leaves the water to craw! over a hard, rough surface 



