Bombus, [53].
Bombyces, flight of females impeded by eggs, [17];
habits of, [44].
Bonellia viridis, unequal length of life of male and female, [59].
Bonnet, on rudimentary tails in dogs, [428].
Born, on position of nucleus in ova, [177];
on double impregnation, [382].
Bosmina, parthogenesis of, [325].
Brooks, on heredity, [166], [326].
Brown-Séquard, experiments on guinea-pigs, [81], [310], [313].