of Molpadiida, [575];
of Synaptida, [576];
of Synapta inhaerens, [577]
Burrowing Urchins, [529]
Bury, on primary axial sinus of Holothuroid larva, [564];
on change in position of mouth during metamorphosis of Auricularia, [614]
Bütschli, on protoplasm, [16] n.;
on paramylum, [95] n.;
on Protozoa, [46];