Merycotherium, of Siberian drift, i. 112
ii. [217]
Mesacodon, N. American Tertiary, i. 133
Mesapia, ii. [479]
Mesites, ii. [263]
Mesohippus, N. American Tertiary, i. 135
Mesomys, ii. [239]
Mesonauta, ii. [438]
Mesonyx, N. American Tertiary, i. 134
Mesopithecus, Miocene of Greece, i. 115