504 



Index 



Sargent, 67 

 Say, 34 



San Jose, see Scale 

 Scab mites, 409 



Scale, insects, 391; control, 405-6 

 fluted, 405 

 San Jose, ill. 403-6 

 Scales, see Fish, Placoid 

 "Scalp Act," Pennsylvania, 390 

 Scarlet Tanager, color, 343 

 molt control, 225-6 

 ill. 226 

 Schmidt, 363 

 Science and Religion, 45 

 Scripps Institution, 351 ; location, 

 71 

 support, work, 71-2 

 Scudder, 43 



Scurvy, cause, prevention, 293 

 Scorpions, fossil, 124 

 Scott, W. E. D., reminiscences, 44, 

 88 

 quoted, 138, 140, 145, 174-5 

 Screw worm, 409 ; ill. 408 

 Sea anemone, see Motility 

 Sea cucumber, regeneration, 193 

 Sea island cotton, hybridization, 



268 

 Sea-squirt, see Tunicates 

 Sea urchin, artificial parthenogene- 

 sis, 329 

 cross fertilization, 328 

 union of egg and sjterm, 327 

 see Intercrossing 

 Seal, controversy, 432-4 

 destruction, 433 

 discovery, 431 

 distribution, 172 

 killing, 433 

 life history, 432 

 profits, 432 

 ill. 433 

 Sebright poultry, secondary sex- 

 ual characters, 325; ill. 326 

 Secondary sexual characters, 325 

 Secretion, see Internal, Sex glands 

 Sedgwick-Rafter method, 376 

 Seed, chemical treatment, struc- 

 ture, 245 

 Segregation, see Inheritance 

 Selection, 266, 330, 334; natural, 

 235-9 

 see Sexual 

 Sensitive plant, see Mimosa 

 Sequoia, climate, 77 



gigantea, sempervirens, distribu- 

 tion, 184-5 

 ill. 185 



Serum, meningitis, 448-9 

 tetanus, 449 



see Anti-human, Blood, Diph- 

 theria 

 Sewellel, distribution; ill. 186 

 Sex, 89; beginnings, 96 

 cells, 203-0 

 origin, 471 

 union, 327-8 

 chromosomes, see Sex determina- 

 tion 

 control, 232 

 cycle, bee, 230-31 

 daphnids, 231 

 rotifers, 231 

 determination, 208-10, 228, 230-3 

 see Birds, Crustacea, Gephy- 

 rea, Orchestia 

 differentiation, 97, 103 

 function, 479 



glands of fish, secretion, 361 

 inheritance, 479 



intergrades, Daphnia, gypsy 

 moth, plantain weed, Sinio- 

 cephalus, 233 

 linked, see Linkage 

 nematodes, 231-2 

 organs, see Hydra, Vaucheria 

 origin, 471, 479; see tancer 



theories 

 Protozoa, 96-8 

 ratio, see Rat, inbreeding 

 see Hormones, Immorality, 

 Secondary sexual characters 

 Sexual characters, see Secondary, 



selection, 343-6 

 Shad, migration, 156, 361 



propagation, 426 

 Shagreen denticles, see Sharks, 



scales 

 Sharks, as food, 435 

 fossil, 120 

 Port Jackson, 133 

 scales, 120 

 Sheep, see Ancon, Merino, Moun- 

 tain 

 Shells, see Diatoms, Desmids, Pro- 

 tozoa 

 Shrews, see Owls 

 Shull, A. P., 232 



G. H., 265 

 Siamese twins, 228 ; ill. 229 

 Sigsbee, see Sounding 

 Silkworm, see Moth 

 Silliman, 45, 50 

 Silurian period, lungfish, 120 

 "Silva of North America," 67 

 Simocephalus, see Sex intergrades 



