Rhopalura giardii, occurrence and structure, [94], [95];

R. intoshii, [94]

Rhynchelmis, [365], [376]

Rhynchobdellae, [396] f., [405]

Rhynchodemidae, [35], [42]

Rhynchodemus, [34], [35], [42]

Rhynchopora, [531]

Rhynchozoon, [529] n., [531]

Riches, on British Nemertinea, [110];

on Malacobdella, [119]