Part 32

Volvox, 252, 254, 259, 265.

Von Baer, law of recapitulation, 71.

Vorticella, 251, 252, 265.

Wagner, 100.

Wallace, Alfred Russel, 117, 100.

Walruses, 38.

Wasps, ground, 207; organizations, of digger, 260; 261.

Weismann, 71, 72; proved nuclei of egg contains, essential factors, 71, 145, 148.

Weisner, 143.

Whales, 40.

Wilson, 146.

Woehler, 29.

Wolf, Tasmanian, a true marsupial, 42.

Wolff, 70.

Wolves, 140.

Wombat, 42.

Wood-frog, 71.

Woods, heredity of mental qualities, 232.

Worms, blindworm of England, 45; 48, 50, 53, 81; nervous mechanism of, 205, 206; nervous system of, 256, 257.

Zebras, 96, 97, 112.

Zooelogy, 34, 75, 78; geographical distribution, 100.

"Zooenomia," 135.

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