on Noctiluca, [134] f.

Balanoglossus, larva and affinities of, [616]

Balantidium, [137];

habitat of, [152]

Balbiani, on Protozoa, [45];

on regeneration, [35] n.;

on "Pébrine" (Nosema bombycis), [107]

Barbados, Miocene deposit of Radiolaria, [87]

Barotaxy, [20]

Barrier reef, [390] f.