Aphanapteryx of Mauritius, 164

Aphelotherium, European Eocene, 125

Aquila, European Miocene, 161

Archæopteryx, Bavarian Oolite, 163

Arctic zone not a separate region, 68

Arctocyon, European Eocene, 125

Arctodus, N. American Post-Pliocene, 130

Arctomys, European Pliocene, 113

Arctotherium in Brazilian caves, 144

S. American Pliocene, 146