Visceral nervous system, of Nereis, [255]

Vitellarium = Yolk-gland, q.v.

Vitello-intestinal canal, in Polystomatidae, [57]

Viviparous, Nemertinea, [109], [117];

Rotifers, [200], [216] f.;

Polychaeta, [256], [276]

Volvox, Rotifers in, [227]

Vortex, [44];

British species, [50];

body-cavity, [43]