INDEX. 
Skeleton, outside, of insects, 154, 
157- 
Skeleton shrimp, Caprella, 163. 
Slave-making ants, 288 ; helpless- 
ness of one kind, 291. 
Slug, figure of, 122; hidden shell 
in back of, 12 1. 
Smeathman on termites, 228, 231. 
Snails, metamorphosis of worms in, 
138; winter shelter of, 121; 
eyes and breathing chamber of, 
120. 
Snake-locked anemone, 68. 
Snare-weavers, 179-200. 
Solen, in. 
South America, calamary's arm 
from, 131. 
Sphex paralysing insects for food, 
267. 
Sphinx moths and their caterpillars, 
244. 
Spicules of sponges, 45. 
Spider, nervous system of, 189 ; 
males feeble and small, 1 90 ; 
cocoons of, 190, 191, 195 ; 
structure of, 183 ; entangling her 
victim, 1 88; manner of spinning 
web, 184. 
Spiders, house, web of, 185 ; 
hunting-, 195 ; tunnelling-, 191 ; 
water-, 196; trap-door-, 192; 
gigantic, 197. 
Spines of sea-urchin, 94, 97. 
Spinnerets of spider, 184. 
Spiracles of grasshopper, 212. 
Spirorbis, 148. 
Sponge, British, 37 ; flint, 47 ; 
section of, magnified, 46 ; lime, 
44 ; cup, 48 ; rank of, 35, 41 ; 
spicules of, 45 ; homes of, 35 ; 
section of bath-, 41 ; -fisheries, 36. 
Sponge-animal, growth of, 39-42 ; 
eggs of, 37, 38; flesh composition 
of, 35 ; tissue, 34. 
Sponges, boring, destroying oysters, 
no. 
Spur on leg of ant, 271-273. 
Squids, ten - armed cephalopods, 
130. 
Star-fish, eyes of the, 88 ; infancy 
of common, 80 ; its rank among 
animals, 10; various forms and 
sizes of, 101 ; walking apparatus 
of the, 83-86; figure of common, 
84 ; section of a, showing struc- 
ture, 85 ; food of the, 87 ; water- 
hole of the, 85. 
Staveley, Miss, on burying beetles, 
259- 
Stone -lily the young of feather- 
star, 91. 
Stone-lilies or crinoids, 78. 
Straight-winged insects, 210. 
Struggle for existence, 5-7, 12. 
Suckers in arms of octopus, 1 29. 
Sun-slime, 29. 
Sympathy, how far existing, in ants, 
298. 
Synapta a kind of sea-cucumber, 
101. 
TEETH in lobster's stomach, 1 68 ; 
ofmollusca, 116. 
Tennent, Sir E., on Ceylon leeches, 
143- 
Tentacles of hydra, 53 ; of sea- 
cucumber, 83; of snail, 120. 
Terebella, or shell-binding worm, 
148, 149. 
Teredo, a mollusc, 113. 
Termites, or white ants, 225-231 ; 
figures of, 226 ; mode of working 
of, 227, 229 ; queen-cell of the, 
228 ; eggs and nurseries of the, 
229 ; marching columns of, 231 ; 
captured by ants, 230. 
Termite mounds of Africa, 230. 
Testacella, figure of, with shell, 123. 
Texas, agricultural ant of, 295. 
Textularia, 23. 
Thorax, definition of term, 156 ; of 
grasshopper, 212. 
Thread-slime or Protogenes, 16. 
Ticks, 136. 
