Aramus, ii. [357]

Arapaima, ii. [454]

Arborophila, ii. [338]

ARCADÆ, ii. [534]

Archæomys, ii. [238]

Archæopteryx, Bavarian Oolite, i. 163

Archibuteo, ii. [348]

Arctic shells, ii. [518]

zone not a separate region, i. 68

Arctitis, ii. [195]