INDEX 



461 



SCHIEMENZ, PROFESSOR, on food-get- 

 ting habits of starfish, 241 



SCHLEIDEN, M. K., 445 



SCHULTZE, MAX, 446 



SCHWANN, THEODOK, 446 



Scorpions, 121 



SCUDDER, H. S., on the distribution 

 of the monarch butterfly, 47 



Scyphozoa, 270 



Sea-anemone, 240; -lily, 246, 296, 

 347 ; -squirt, 302 ; -urchin, 247 ; 

 -walnut, 270 



Seal, Alaskan fur, 421 



Selection, artificial, 102 ; natural, 

 102; sexual, 106 



Seminal receptacles, 209 ; vesicles, 

 209 



SEMPER, KARL, on the pond-snail, 

 109 



Serpula, 224 



Shark, 317, 325, 347 



Sheep, 413, 415, 416 



Shell-fish, 169 



Sieve-plate, 239 



Siphon, 160 



Siphonoglyphe, 254 



Siphuncle, 191 



Skate, 317 



Skipper, 50 



Skunk, 421 



Slipper-animalcule, 286 



Sloth, 412 



Slug, garden, 182 



Snail, land, 181 ; pond, 177 



Snakes, 353 ; copperhead, 355 ; green, 

 357 ; water, 357 



Snipe, Wilson's, 381 



Somites, 2 



Sow-bug, 147 



Sparrows, 389 ; chipping, 395 ; Eng- 

 lish, 389, 393; grasshopper, 395 ; 

 house, 389 ; song, 390 



Specialized forms, 89 



Species, 95 



SPENCER, HERBERT, 451 



Spermatozoon, 209 



Spicules, 275 



Spiders, 116; garden, 117 ; jumping, 

 120; trap-door, 120 



Spinal cord, 302 



Spinnerets, 116 



Sponges, 296; bath, 277; fresh- 

 water, 273 



Spores, 284 



Sporozoa, 291 



Spring-tails, 97 



Squame, 127 



Squid, 188 



Squirrels, 418, 419; gray, 398; red, 



405 



Statoblasts, 233 

 Steapsiu, 199 

 Stork, white, 380 

 Struthiones, 374 

 Sturgeon, 318 

 Subimago, 26 

 Subsidence theory, 262 

 Sucking-disk, 188, 239 

 Sunfishes, 321 

 Swallow, 391, 395, 397 

 Swan, trumpeter, 378 

 Swimmeret, 128 

 Sycon, 277 

 Symbiosis, 79 

 Symmetry, bilateral, 152; radial, 



236, 298 

 System, water-vascular, 239 



Tadpole, 334 



Tapeworm, 227 



Tarantula, 119 



Tarsus, 4 



Teleostomi, 317 



Telson, 128 



Terns, 376 



Terrifying organs, 42 



Theromorphs, 361 



THOMSON, PROFESSOR, on the cell 

 theory, 446 ; on rapid development 

 of aphis, 104 



Thoracic duc, 404 



TIIORNDIKE, PROFESSOR, on intelli- 

 gence of animals, 426, 427 



Thrushes, 390 



Thymus gland, 404 



Thyroid gland, 404 



Thysanura, 97, 99 



Tibia, 4, 333 



Ticks, 121 



Tiedemann's vesicle, 243 



Tiger, 420 



Toads, 343; common, 344; obstet- 

 rical, 343 ; Surinam, 343 



Tobacco-worm, 54 



Tonsils, 403 



Torpedoes, 317 



