in Alcyonaria, [340];

in Zoantharia, [371]

Bud-fission in testaceous Rhizopoda, [55];

in Euglypha, [29]

Buffon, on organisms of putrefaction, [43]

Bulimina, [59]

Bulk and surface of organism, ratio between, [14]

Bunodactis gemmacea, [378]

Bunodeopsis, [382]

Bunodes, [378], [382];