INDEX 



461 



Respiration denned, 121 



Reticulum, 420 



Rheas, 377 



Rhinoceros, 418, 419, 439 



Ring canal, 224 



Robin, 393 



Rocky Mountain spotted fever, 143 



Rodentia, 422 



Rodents, 422 



Ross, Sir Ronald, on malaria, 101, 297 



Rostrum, 146 



Rotifera, 308 



Roundworms, 256, 260, 308 



Royal jelly, 84 



Rumen, 420 



Ruminants, 421 



Sacred beetle, 45 



Salamanders, 344 



Salmon, 324 



Sanctuaries, wild-life, 432 



Sand dollars, 232 



Sandpipers, 384 



Sandworm, 251 



Sanford, Professor, on intelligence 

 of fish, 319 



San Jose scale, 36 



Saponification, 119 



Sapsuckers, 389 



Sarcodina, 298, 307 



Sawflies, 93 ; American, 93 ; currant, 

 93 



Scale insects, 35 ; cottony, 36 ; oyster- 

 shell, 36 ; San Jose, 36 



Scales, insect, 54; fish, 311 



Scallop, 200 



Scapulas, 338, 373 



Scarabaeus, 45 



Scarabs, 44, 45 



Scarlet fever, 432 



Scavenger beetles, 47 



•Schleiden, 444 



Schultze, Max, 445 



Schwann, 444 



Science, 442 



Scientific name, 107 



Scorpions, 144 



Scudder, S. H., on butterflies, 56 



Scurvy, 125 



Scyphozoa, 275, 308 



Sea anemone, 275 



Sea combs, 308 



Sea cucumber, 234, 309 



Sea lily, 231, 309 



Sea squirt, 305 



Sea urchin, 232, 309 



Seals, 424, 425 



Seasonal dimorphism, 59 



Secondary sexual characters, 128 



Secretions, 10 ; internal, 127 



Selection, artificial, 173-174 ; natural, 



182 ; sexual, 186 

 Sense organs, 96 

 Sensory nerve cell, 245 

 Serpent stars, 231, 308 

 Serum, 431 



Seventeen-year locust, 30 

 Sewage contamination, 199 

 Sexual dimorphism, 59 

 Sexual selection, 186, 391 

 Shad, gizzard, 329 

 Shagreen, 322 

 Sharks, 321 

 Sheep, 418 

 Shellac, 38 

 Shipworms, 201 

 Shoulder girdle, 316, 338 

 Shrews, 427 

 Shrimp, 160 

 Sieve plate, 224 

 Silk glands, 62 

 Silkworm moths, 61 ; American, 63 ; 



Chinese, 62 ; giant, 63 

 Silverfish, 109 

 Simplest insects, 109 

 Sinuses, 7, 152 

 Siphon, 192, 216 

 Skate, 321 

 Skippers, 61 

 Skunk, 424, 432 

 Sleeping sickness, 71 

 Slipper animalcule, 292 

 Sloths, 415 

 Slug, garden, 211 

 Smallpox, 431 



Snail, 309 ; land, 211 ; pond, 207 

 Snake feeders, 24 

 Snakes, 354, 357; black, 361; bull 



361 ; copperhead, 359 ; coral, 359 



fox, 361; garter, 362; green, 361 



king, 361; moccasin, 359; water, 



361 

 Snipes, 384 

 Snout beetles, 51 

 Snow fleas, 110 

 Societies, 447 

 Soft-shell clam, 189 

 Solitary bees, 89 

 Somites, 2, 238 

 Sow bug, 163 

 Sparrows, 393 

 Specialized insects, 111, 112 

 Species, 1, 14, 107 

 Specific name, 107 

 Sperm cells, 11, 127, 133 

 Sperm ducts, 154 

 Sperm whales, 417 

 Spermaries, 12, 154, 230, 245, 317, 



338, 375, 409 

 Spermatozoa, 133, 154, 195, 198, 339 



