Page:First course in biology (IA firstcourseinbio00bailrich).pdf/641

School and health, H 135.

Sclerotic, H 150.

Scouring rush, P 203.

Scramblers, P 129.

Sea anemone, A 33.

Sea fan, A 32.

Sea horse, A 124.

Sea urchin, A 38.

Seed, P 20, 163, 180;
  coat, P 21.

Selaginella, P 204.

Selection, natural, P 8;
  artificial, P 8.

Sense, muscular, H 143;
  thermic, H 142.

Senses of insects, A 76.

Sensory, cell, H 120;
  fiber, H 120, 121.

Sepal, P 133, 169.

Septicidal capsule, P 166.

Serum, H 61.

Sessile, P 77.

Setæ, A 43, 48.

Sexual selection, A 174.

Shark, A 121.

Shelf fungus, P 194.

Shoes, H 48.

Shoulder, H 32.

Shrub, P 19.

Sick headache, H 133.

Sieve tubes, P 66.

Silicle, P 167.

Silique, P 167.

Silkworm, A 84, 86, 95.

Silver scale, A 83.

Siphon, A 101.

Siphonoptera, A 82.

Skeleton, of bird, A 152;
  cat, A 188;
  frog, A 131;
  of fish, A 113;
  man, H 28;
  chart of, A 218.

Skin, H 16.

Skull, H 63;
  mammalian, A 194.

Sleep, H 130.

Slipper animalcule, A 13.

Sloth, A 199.

Slug, A 105.

Smell, H 147.

Snail, A 105.

Societies, P 9.

Soil, P 40, 47, A 48.

Soredia, P 196.

Sori, P 177, 192.

Souring of milk, H 158.

Spadix, P 140.

Sparrow, A 182;
  English, A 170.

Spathe, P 138, 140.

Specialization, A 20, 27, 66, 210, H 8.

Species, A 8.

Spermary, A 25, 27.

Spermatophytes, P 180.

Spicule, A 18.

Spider, A 94.

Spike, P 157.

Spinal cord, H 120, 121.

Spinal deformities, H 37.

Spine, H 31.

Spiracle, A 77, 87.

Spirogyra, P 184.

Sponges, A 17, 125;
  glass, A 19;
  horny, A 19;
  limy, A 19.

Spontaneous combustion, xiii.

Sporangium, P 177, 186, 188, 201, 203, 204.

Spore, P 176, 178, 181, 184, H 159.

Sporophyll, P 180, 201.

Sporophyte, P 177.

Sports, A 148, 224.

Sprain, H 38.

Squash bug, A 93, 95.

Squid, A 106.

Stamen, P 135.

Starch, x, P 95, 101, H 88, 91.

Starvation, H 138.

Stem, P 49;
  endogenous, P 59;
  exogenous, P 61;
  kinds of, P 49.

Sterilizing wounds, H 163.

Stickleback, A 119.

Stigma, P 135, 144, 145.

Stimulant defined, H 137.

Stipule, P 76, 84.

Stock, P 125.

Stomate, P 87.

Stone age, H 2.

Stone fruit, P 168.

Storage of food, P 99.

Street cleaning, H 163

Struggle to live, P 4, 6, A 147, H 4

Study, comparative, A 82, 149, 223

Style, P 135, 163.

Sugar, H 91, 100.

Sulphur, vii.

Summer-spore, P 191.

Sun energy, P 95, A 2, H 91.

Sunlight, A 2, H18.

Survival of fittest, P 7, A 147, H 4, 141.

Sutures, H 35.

Swarm-spores, P 186.

Sweat gland, H 20.

Symbiosis, P 196.

Sympathetic system, H 127, 129.

Syngenesious, P 141.

Synovial fluid, H 36.