Megamys, S. American Eocene, 148
Megaspira, European Tertiary, 169
Megatheridæ, in Brazilian caves, 145
Megatherium, N. American Post-Pliocene, 130
in Brazilian caves, 145
S. American Pliocene, 147
Melania, European secondary, 169
Meleagris, N. American Miocene, 163
Mellivora, Indian Miocene, 121
Melolonthidium, Oolitic insect, 167