Axolotl, [65], [112] f., [112];

Neoteny of, [65], [112]

Azemiops feae, [638]

Balancers of Amphibia, [45]

Baptanodon, [483], [484]

Barfurth, on absorption of Tadpole's tail, [61]

Bartlett, on Boa constrictor, [602];

on Pipa, [152]

Basiliscus, [528], [530];

B. americanus, [530], [530]