on the mixture of marine and fluviatile species in the Hudson River, [100].

Bain, Mr. A. G., fossil reptiles in South Africa, discovered by, [714].

Baker and Durand, Messrs, researches of, [814].

Bakewell, Mr., the researches of, [737], [878], [887].

Balanidæ, [506].

Balanus tesselatus, [507].

Balcombe, [851].

Bann River, Ireland, diatomaceæ from the banks of the, [94].

Banwell, Somerset, [783], [809], [811], [816], [865].

Bardon Hill, [901].