in fresh water, [492];

external characters, [480];

reproduction, [507];

larva, [511];

relation to Phylactolaemata, [493], [502] f.;

fossil, [521] n.

Cucullanus, [136], [142], [163];

C. elegans, [143], [161]

Cucumaria, as host, [298]

Cuénot, on Gephyrea, [416] n.