Verte"rates, spinal region, [385]

Verte"rates, thyroid, connection between generative organs and, [215]

Verte"rates, tubes, meeting of four, [318], [440]

Vesicles, cerebral, formation of, [48], [458]

Vitellophags, [471], [483]

Volvox, [479]

Wolffian body, [390]

Xiphosura, [24], [26], [249]

Yolk, [482]

THE END