Am. Jour. Sci., Vol. XXVII, 1909. 



Plate II. 



Archelon ischyros Wieland. — Photograph of dorsal view of the type as mounted in the Yale 

 University Museum. (Compare with text figure 7. — The right flipper was bitten away just 

 above the heel early in life by some predaceous enemy, either a shark, a fish or a mosasaur.) 



