Delage, on protoplasm, [3] n.;

on syngamy, [34] n.;

on motion of flagella, [114] n.;

on Sponges, [168], [174], [226];

and Hérouard, on Protozoa, [46]

Delap, M. J., [311] n.

Deltoid plate of Blastoidea, [599]

Demospongiae, [195], [209] f.

Dendoryx, [224]

Dendrite, [444]