306 



INDEX 



Srhwann, 469. 



Scolopendra, 99. 



Scolopendrella, 101. 



Scolytidie, 71. 



Sforpions. 116. 



Scratchers, 394. 



Screech owl, 397. 



Sculpin, 313. 



Scutigera, 9S. 



Scyphozoa, 273, 275. 



Sea-anemones, 273. 



Sea-cows, 442. 



Sea-cucumber, 258. 



Sea-lilies, 258. 



Sea-lion, 446. 



Sea-mouse, 186, 187. 



Sea-spiders, 119. 



Sea-urchins, 238, 254. 



Sea walnuts, 275. 



Seal, 446. 



Searcher, 64. 



Segmentation, of body of annelids, 

 162. 



Segmented animals, 290, 



Selachians, 322. 



Sense-organs of annelids, 107 ; 

 birds, 389 ; crickets, 10 ; cchin- 

 oderms, 245 ; fish, 308 ; frog, 338 ; 

 lizard, 355 : lobster, 126 ; mam- 

 mals, 439 ; Mollusca, 206. 



Serpent, 351. 



Serpent-stars, 253. 



Serpula, 189. 



Sertularia, 268, 278. 



Sexton beetles, 67. 



Sexual dimorphism, 113. 



Shad, 319 ; fishing, value of, 320. 



Sharks, 322. 



Sharp-shinned hawk, 397. 



Shell, rudimentar\-, in cephalopods, 

 221. 



Sheep, 424, 444. 



Sheep-tidv, SS. 



Short-horned Diptera, 80. 



Short-horned grasshoppers, 13. 



Short-winged beetles, 66. 



Shrews, 445. 



Shrikes, 409. 



Shrimps, 138; burrowing, 138. 



Silkworms, 39, 42 ; culture of, 43. 



Silphida?, 67. 



Sih-ersides, 314. 



Simla, 449. 



Siphonata, 227. 



Siphonophore, 271. 



Siren, 338. 



Skeleton, 1 ; birds, 380 ; frog, 329 ; 

 lizard, 352 ; mammals, 433. 



Skunk, 446. 



Skylark, 404. 



Sloth, 441. 



Slow-worms, 360. 



Slug, 208, 210 ; apparent absence of 

 shell of, 211 ; economical impor- 

 tance of, 211 ; food of, 211 ; habi- 

 tat of, 211. 



Smallest organisms, a study of, 280. 



Smelt, 298, 309 ; economic impor- 

 tance of, 309. 



Snail, 198 ; form of bodj', 198 ; mus- 

 culature of, 206. 



Snake, 365. 



Snapping-turtle, 364. 



Snipe, 394. 



Snowbird, 407. 



Snowy owl, 397. 



Social bees, 49. 



Social life of ants, 55. 



Soft-shelled clams, 231, 232. 



Soft-shelled turtle, 363. 



Solenida;, 230, 231. 



Somites, 3, 4. 



Song-sparrow. 407. 



Song thrush, 413. 



Sow-bugs, 145. 



Spanish fly, 75. 



Sparrow, 406; English, 370. 



Sparrow-hawk, 396. 



Spelerpes, 93, 344. 



Sphingida-, 41. 



Spider, 102, 104 ; caye, 96 ; position 

 of in zoological system, 114; webs, 

 economic importance of, 112. 



Spider-crabs, 140. 



Spinnerets, 104. 



Spinning instinct, uses of, 110; 

 methods of, in spiders, 112. 



Spin>" ant-eater. 439. 



Spiracles, 3 ; of cricket, 6. 



Sponges, 262. 



Spontaneous generation, theorv of, 

 282. 



Spoonbill, 324. 



Spore animalcules, 285. 



Sporozoa, 285 ; cause of malaria, 

 285. 



Spotted sandpiper, 393. 



Spreading adder, 365. 



Spread of English .sparrow in Amer- 

 ica, 374. 



Spring azures, 34, 41. 



Spring-tails, 92, 96. 



Squash-bugs, 22. 



Squids, 220. 



Squirrel, 446, 447. 



Stag-beetles, 68. 



