3io 
LIFE AND HER CHILDREN. 
Polyzoa, not dealt with, 103, note. 
Portuguese man-of-war, 66. 
Prawn, structure of the, 160-164; 
shedding his skin, 165 ; cleaning 
himself, 166. 
Prickly-skinned animals, 82. 
Princesses among ants, 282. 
Procession-moths and their cocoons, 
247. 
Protamceba, 18. 
Protogenes, or thread-slime, 1 6. 
Protozoa, 31. 
Psyche-caterpillars in tubes, 247. 
Pteropods or wing-footed snails, 126. 
Pupa of a butterfly, 240. 
Pyramids formed of nummulite 
limestone, 28. 
Queen ants laying eggs, 279 ; no 
jealousy between, 282. 
Queen-termite, 228. 
Radiate plan of structure, 96. 
Radiolariae or flint-builders, 30. 
Rasp (radula) of the periwinkle, 116. 
Rays, of star-fish, 85 ; of brittle- 
star, 90 ; of sea-urchin, 95 ; of 
sea-cucumber, 99. 
Razor-fish, figure of, III; burrow- 
ing habits of, 113. 
Red coral, growth of, 72. 
Red mite of vines, 199. 
Red Sea, sponges of, 35. 
Ringed bodies of insects, 155. 
Roads made by ants, 284. 
Romanes, Mr., on nerves of medusae, 
61. 
Rose, group of aphides on a, 202. 
Rosy feather-star, 89. 
"Rot" in sheep, 139. 
Rotalia, 23-27. 
Rotifera, 137. 
Sagartia viduata, S. bellis, and 
S. troglodytes, 62>. 
Sagartiaciae, special darts of the, 69. 
Sand-hopper, Talitrus, 163. 
Sand-wasp, paralysing insects foi 
food, 267. 
Saw-flies, young, 267. 
Scallop, figure of, 1 1 1 ; eyes of the, 
112. 
Scarabaeus beetle, 258. 
Scent of moths attracting mate*, 
250. 
Schafer, on nerves of medusae, 61. 
Schultze, on birth of miliolites, 25. 
Scorpion, structure of, 180; figure 
of with cricket, 179. 
Sea-anemone. See anemone. 
Sea-cucumber, infancy of a, 82 ; 
power of regrowth in the, 10, 
100 ; structure and food of, 99. 
Sea-fir, Sertularia cupressina, 58. 
Sea-mouse or Aphrodite, 1 50. 
Sea-nymphs, 126. 
Sea-oak coralline, figure of, 56. 
Sea-slugs, 123 ; figures of, 124 ; 
food of, 124. 
Sea-urchin, infancy of a, 81; walk- 
ing on a rock, 94 ; stripped of 
its spines, 95 ; wrapped in sea- 
weed, 93 ; structure of a, 95 ; 
growth of shell of, 96 ; mouth of, 
97 ; food of, 97 ; tube-feet of, 
94. 
Sea- worms, fixed, 148 ; active, 151. 
Seeds collected by harvesting ants, 
293- 
Sepiola blowing a hole in sand, 130. 
Serpula, its tube and tentacles, 
148. 
Sertularia cupressina, 58 ; S. plum- 
ula, 56. 
Sexton or "burying" beetles, 259. 
Sheath-winged insects, 251. 
Shell of argonaut, a' cradle, 1325 
of sea-urchin, 96. 
Shell-builders, the simplest, 22. 
Shrimp, hand of the, 163. 
Silkworm, how it spins, 245. 
Simplest children of life, 10, 14. 
Siphon of octopus, 127. 
i Skeletons of sponges, 43-49. 
