312 
LIFE AND HER CHILDREN. 
Tiger-beetle grub feeding, 256. 
Tools of an animal grow upon it, 7. 
Tortoise-shell butterfly, life of the, 
236. 
Trachea or breathing-tube, 212. 
Trap-door spiders, 192. 
Trepangs, I or. 
Trichina in pork, 140. 
Trilobites, 173. 
Tube-feet of star-fish, 80 ; of sea- 
urchin, 94. 
Tube-hydra or Tubularia, 58. 
Tube-sucker or Acineta, 21. 
Turkey, sponges of, 49. 
Two-winged flies, 261. 
UNIVALVE SHELLS, formation of, 
1 06. 
Uraster rubens, 84. 
VEGETABLE- FEEDING MOLLUSCA, 
114. 
Venus' Basket, figure of, 47. 
Vertebrata and their divisions, 12. 
Vesicles, supplying the tube-feet of 
star-fish, 87. 
Victoria Regia, Medusa in tank of, 
54- 
Vorticella or bell-flower, 21. 
WALLACE on rate of increase of 
birds, 4 ; cited 266. 
Wars of ants, 285. 
Wasp, spider releasing a, 1 89. 
Wasps, nests of, 267. 
Water-boatman, Notonecta, 208. 
Water-cresses, flat-worms on, 137. 
Water- flea (Daphne), 159, 177; 
-measurers, 207 ; -mites, 136, 
199; -snails, 120; -spider, 196. 
Weapons of animals, meaning o f 
term, 7; of sea- worms, 150. 
Web of garden spider, 185 ; of 
house spider, 191 ; of tunnelling 
spider, 191. 
Weevils, 254. 
West Indies, land-crab of the, 173. 
Wings of bugs different from beetles, 
209 ; of butterflies, 240. 
Winged ant killed by slave-makers, 
291. 
Winged ants, 282. 
Wing-footed snails, 126. 
Whale feeding on jelly-fish, 76. 
Whelk and eggs, figure of, 1 1 8 ; 
drilling rasp of, 119; young of, 
free-swimming, 119. 
Whelk-shell, hermit crab in a, 1 70. 
Whip-cells of a sponge, 40. 
White ants, not true ants, 225, 231. 
White, Mr. Charters, on a fish within 
a sea-anemone, 69. 
Wood-louse a crustacean, 1 73. 
Worms, their rank among animals, 
II, 135; parasitic, 138-141; 
sea-, 151 ; ribbon-, wheel-, and 
long-, 137. 
Workers of ants imperfect females, 
2 7 6. 
YELLOW ant tending eggs of 
aphides, 287. 
ZYGENA filipendula, 246. 
