532 



INDEX 



Smell, sense of, 210, 211 



Smyrna fig, 416 



Snail, 86, 87, 235, 370, 396-398 



Snake, 120-123, 327, 357, 358, 365, 



367 

 Snapping turtle, 1 21 

 Social habituation, 431, 437 

 Social heredity, 314, 444 

 Sociology, 4, 5, 286 

 Soil, 82, 403, 416-419 

 Solar energy, 32-34, 45, 224, 226 

 Soma, 58, 59, 231, 232, 236, 243, 284, 



383, 469; -See: Germ plasm 

 Somatic, cells, 243; mesoderm, 265, 



266; mutations, 312 

 Song sparrow, distribution, 369 

 Spallanzani, 220, 460 

 Span of life, 375, 402 

 Special creation, 222, 350, 351 

 Species, 46, 47, 349-354, 369, 376, 



456, 457; number, 47, 477-479; 



origin, 349-385, 471-476 

 Spencer, 23, 132 

 Sperm, 11, 57, 59, 191, 230, 231, 247, 



251, 252, 340, 453, 468; See: Gam- 

 ete 

 Spermatic fluid, 194 

 Spermatid, 245 

 Spermatocyte, 244, 245 

 Spermatogenesis, 244-24$, 305 

 Spermatogonium, 239, 243-245, 304, 



306 

 Spicule, 68, 69 

 Spider, 95, 478 

 Spinal, cord, 110-112, 133, 135, 145, 



146-149, 200-216; nerve, 205-207 

 Spiny anteater, 127 

 Spiracle, 93, 271 

 Spirillum, 38, 39 

 Spirostomum, 54 

 Splanchnic mesoderm, 265, 266 

 Spleen, 146-148, 178 

 Splint bone, 357, 362-364 

 Spondylomorum, 58 

 Sponge, 67-71, 477, 480 

 Spongilla, 69, 70 

 Spontaneous generation, 218-221, 



399, 454 

 Spore, 39, 52, 53, 223, 230, 319, 337 

 Sporocyst, 397, 398 

 Sporozoa, 47, 52, 53, 229, 230, 340, 



477 

 Sporulation, 230; See: Sporozoa 



Springtail, 92, 94 



Spur, 331, 333, 334 



Squamata, 120, 121 



Squeteague, 336 



Squid, 89, 90, 215, 336 



Squirrel, 129, 148, 321, 322, 352-354, 



407 

 Stable fly, 94 

 Stag, 192 

 Stapes, 213 

 Starch, 22, 33, 155 

 Starfish, 17, 83, 84, 236, 478 

 Statoblast, 83 

 Statocyst, 72 

 Stature, human, 379 

 Stentor, 54 

 Sterilization, 220 

 Sternum, 139, 142, 144, 149 

 Stick-insect, 327, 328 

 Stigma, 50, 51, 59 

 Stimulus, 27, 64, 165, 209, 217; See: 



Sense organs 

 Sting of bee, 333 

 Stomach, 105, 146-149, 152-156 

 Stone age, 438-444 

 Stonefly, 94 

 Stonehenge, 443 

 Stork, 126 

 Strawberry, 416 

 Stream of life, 229 

 Strobila, 75 

 Struggle for existence, 329, 336, 375, 



376, 472-476; See: Web of life 

 Sturgeon, 115 

 Styela, 275, 279, 478 

 Stylonychia, 54 

 Subclass, 354 

 Subcutaneous tissue, 134 

 Subesophageal ganglion, 102, 105-108 

 Subgenital pit, 74 

 Subspecies, 354, 369 

 Sucrase, 156 

 Sugar, 22, 32, 33, 156, 182, 183, 197, 



318 

 Sun animalcule, 49 

 Sunlignt, 32, 33, 45 

 Supporting tissue, 62, 63, 65, 139; 



See: Cartilage, Skeleton, etc. 

 Suprascapula, 141 

 Surgery, 221, 389, 444 

 Survival of the fittest, 377, 475, 476; 



See: Web of life, Evolution 

 Swammerdam, 453 



