Hemibos, Indian Miocene, 122

Hemicyon, European Miocene, 118

Herpetotherium, N. American Tertiary, 134

Hesperomys, N. American Tertiary, 140

in Brazilian caves, 145

S. American Pliocene, 147

Hesperornis, N. American Cretaceous, 164

Heterodon, in Brazilian caves, 145

Hexaprotodon, Indian Miocene, 122

Hickman, Mr. John, on a cause of the extinction of large animals, 158