CRETACEOUS REPTILES OF THE UNITED STATES. 3 
on each side, those of the upper jaw being opposed ,to the lower ones. It is 
difficult to conjecture the use of these pits, though the author has suspected 
that probably these sprung from the tooth-like processes of the horny beaks 
with which the jaws of turtles are furnished. A skull, the only part yet dis- 
covered which is distinctly referrible to the genus, was obtained from the green- 
sand near Barnsboro’, Gloucester county, New Jersey. It bears a resemblance, 
among living turtles, most nearly to the great Amazon turtle, Podocnemys. 
The species is named Bothremys Cookii, in honor of Professor George H. 
Cook, of Rutger’s college, New Brunswick, New Jersey, who greatly assisted 
the author in procuring gpecimens for his examination, which form part of the 
raaterial of the memoir. 
