INDEX 



493 



Sacculina, *412 



Sacrum, 331 



Salamander, western brown, *203; 

 tiger, *204 



Saliva, action of, 307 



Salivary glands, of man, 307 



Salmo irideus, *196 



Salmon, 196, 199 



Salts, inorganic, function, 298 



Sanitation, 382 



Sayornis nigr leans, nest and eggs, 

 *219 



Scale, cottony cushion, *181; San 

 Jose, *185; *186 



Scapula, of man, 333 



Schoolroom, equipment, 461 



Scientific names, 110 



Scolopendra, *156 



Scorpion, *164; successive positions 

 of body and legs in walking, *49 



Scutigera forceps, *155; 156 



Sea-anemone, 136 



Sea-horses, 197; *198 



Seals, 254; fur, *255; killed by 

 parasites, *419 



Sea-squirt, *193 



Sea-urchin, 140 



Selection by nature, 401 



Sense, organs, special, classification, 

 368, 290 



Senses, special, and their organs, 69 



Sepia, 178 



Sheep, domesticated races, 267; 

 American merino, *270; Rocky 

 Mountain, 253; wild *271 



Shells, sea, 177 



Ship-worm, 175 



Shoulder blades, in human body, 333 



Shrews, 247 



Sight, of man, 368, 370, 374; func- 

 tion and organs of, 75 



Silkworm, domesticated, 274 



Skeletal system, in man, 290 



Skeleton, of man, *330; functions, 

 329; axial, 329; appendicular, 

 329; comparison in adult and 

 child, 337 



Skin as an excretory organ, 350; 

 functions, 352; structure, 352; 

 as a heat regulator, 355; section, 

 *353; touch papilla, *369 



Skink, blue-tailed, *206 



Skull, *332; structure, 332; support, 

 333 



Sleeping sickness, caused by proto- 

 zoan parasite, 130 



Slug, California giant yellow, *176 



Smell, organs and function, 71; of 

 man, 370 



Smelling pits of antenna of carrion 

 beetle, *72 



Snails, 176; pond, external struc- 

 ture, 5; in aquarium, *6 



Snakes, 208; gopher, *208; garter, 

 *209; king, *210; rattle, 211; 

 rattle, rattles, *211; rattle, poison 

 fangs, *212; rattle, remedies, 212 



Snake, glass, 207 



Snowflake, *234 



Social life, 426 



Sparrow, English, external struc- 

 ture, 12; *13; habits, 18; feath- 

 ers, types, 14; parts, *14, wes- 

 tern chipping, *220 



Species, defined, 112 



Spider, 165; eyes and mandibles, 

 *166; spinnerets, *167; hunting, 

 167; trap door, *167; jumping, 

 *168; running, *168; web-weav- 

 ing, 168; crab, 167, *168 



Spinal column, *330; cord, struc- 

 ture, 362 



Spinnerets of spider, 167 



