N. American Tertiary, 134
Hyænodontidæ, European Miocene, 118
Hydrochœrus, N. American Post-Pliocene, 130
Hydrornis, European Miocene, 162
Hyohippus, N. American Tertiary, 135
Hyomoschus, European Miocene, 120
Hyopotamus, European Miocene, 119
N. American Tertiary, 137
Hyopsodus, N. American Tertiary, 133
Hyotherium, European Miocene, 119