Crocodilus.
_C. liodon_, Marsh. Am. Jour. of Sc., 3d Ser. vol. i., p. 454.
_C. affinis_, Marsh, loc. cit.
_C. Grinnelli_, Marsh, loc. cit., p. 455.
_C. brevicollis_, Marsh, loc. cit., p. 456.
_C. parvus_, sp. nov. This report, p. 91.
_C. clavis_, Cope. Pr. Am. Phil. Soc., 1872, p. 485; U. S. Geol.
Survey, 1872, p. 612.
_C. sulciferus_, Cope. Pr. Am. Phil. Soc., 1872, p. 555; U. S.
Survey, loc. cit.
_C. hetorodon_, Cope. _Alligator heterodon_, Pr Am. Phil. Soc., 1872,
p. 544; U. S. Geol. Survey, 1872, p. 614.
_C. aptus_, Leidy. Cont. to Ext. Vert. Faun., p. 126.
_C. Elliotii_, Leidy, loc cit.
Diplocynodus.
_D. subulatus_, Cope. U. S. Geol. Survey, 1872, p. 613; _Crocodilus
subulatus_, Pr. Am. Phil. Soc., 1872, p. 554.
_D. polyodon_, Cope. U. S. Geol. Survey, 1872, p. 614. (In his report
to Lt. Wheeler, Prof. Cope says that "a single species, the _D.
subulatus_, occurs" in the Bridger Basin, (p. 60). It is therefore
probable that he has changed the _D. polyodon_, but we cannot find
its synonym.)