C. pisiformis, development, [81], [85], [89]
Cysticolous, Myzostomaria, [344]
Cystoidotaeninae, [91]
Cystotaeninae, [91]
Dactylogyrus, [73]
Dalyell, on habits of Turbellaria, [6], [10], [20];
on regeneration in Polychaeta, [283];
on tubes of Polychaeta, [287];
on Hirudinea, [405] n.;