INDEX 



591 



Semper, 119 3 , 131, 134", 213, 222" 419 77 , 



420 96 

 Sense, of sight, in forest mammals, 423 



of smell, 52 

 Sense organs, of cave animals, 533 



of terrestrial animals, 422, 450 

 Sepia, 188 

 Sepiola, 241 

 Sergestes, 232, 273 

 S. magnificus, 260, 262 

 Serpulid worms, 216 

 Serranus, 219 

 S. gigas, 282 



Sertularella tricuspidata, 153 

 Sesia, 143 



Sessile animals on eroding shores, 199 

 Seston, 233 



Seth-Smith, 418 10 



Seton, 420 132 , 442 49 



Seurat, 222 61 , 376 80 



Sewage, pollution of rivers, 550 



Seydel, 300* 



Shackleford, 145 6 



Sharp, 97 81 



Sharpe, 134 1 



Shelford, 21 3 , 22 28 , 55 14 , 221 10 , 319 8 



Shelf ord and Deere, 21 2 



Shelford and Gail, 163 63 



Shelford, Weese, et al., 22 1 15 



Shore birds, gregariousness, 4S7 



Shore zone in lakes, 326 



Shores, life of, 470 



Sialis, 309 



Siberian steppe, 454 



Sicily, variation of Murella, 77 



Sida crystalline!, 349 



Siebenrock, 96 62 



Siebold, 71 15 



Sierra Nevada, zonal distribution, 494 



Silenia sarsii, 265 



Silo, 314 



S. nigricomis, 313 



Silurus glanis, 130, 341, 342 



Simla speciosa, 438 



Simon, 120 48 



Simroth, 116, 120 56 , 222 29 , 247 6 , 468 42 , 

 526". 16. 20 



Simulium, 312 

 Sipho, 195 

 Sipunculus, 220 



S. nudus, 190 



Sirex gigas, 440 



Silta, 410 



Size, of animals on islands, 130 



of northern forms, 159 



of standing inland waters, 321 

 Sjostedt, 419 91 , 442 46 

 Skorikow, 318 1 

 Skylark, introduction in New Zealand, 



115 

 Smith, 22 21 , 72 63 , 96 64 , 357 46 , 468 4 

 Smolian, 318 7 , 357 28 

 Snails, adjustments for drought, 46 



loss of shell, 46 



of the alpine zone, 500 



resistance to sea water, 69 

 Snethlage, 97 72 , 442 M - « 468 22 

 Snout beetles, dispersal by driftwood, 69 

 Sociability of forest birds, 432 

 Sodium chloride, importance to animals, 



417 

 Soergel, 110, 119 36 

 Soil types, effect on animals, 415 

 Solaster pappostis, 81 

 Solen, 185 

 S. pelliicidiis, 186 

 Solenodon, 107 

 Solger, 419 60 

 Sollas, 55 29 



Solpugids of steppes, 462 

 Somateria, 276 

 S. molissima, 482 

 S. spectabilis, 482 

 Sonneratia, 197 

 Sonorina, 466 

 Sorex, 546 

 Sorex alpirrus, 502 

 Sorocelopsis decemoculata, 529 

 South America, 112 

 deciduous forests, 438 

 origin of fauna, 105 

 Space limitation, effect of, 130 



on islands, 522 

 Spalax, 387 



Sparisoma aurofrenaium, 219 

 Spatangux, 195 

 Spatha, 353 

 Spathidium, 346 

 Species density, 143 

 in plankton, 144 



