Index 



Salpa democratica, distribution, con- 

 trol of, 240, 286, 290; questions 

 on, 241; seasonal, 250, 288, ver- 

 tical, 251, 288, surface, 252, 288; 

 relations between temperature 

 and surface distribution, 252- 

 261, 288, 289, bearing of on 

 morphology, 256, on locomotion, 

 261; existence of protruding 

 chains, 258, 290. 

 life cycles, 241; relation between 

 season and temperature, 262, be- 

 tween position and temperature, 

 265; viscosity theory, 269, 290; 

 peculiarities in temperature rela- 

 tions, 274-281, 289. 

 locomotion, theory of, 271, 286; 

 conditions deduced from, 276, 

 279, 280. 



Salva democratica, Differentials in 

 Behavior of the Two Generations 

 of, Relative to the Temperature 

 of the Sea, 239. 



Salpa fusiformis, 260, 272. 

 zonaria, 260. 



San Diego, California, 68, 448. 



San Francisco Bay, distribution of 

 shipworm in, 27-43; temperature 

 of, compared with that of Chesa- 

 peake Bay, 38; physical charac- 

 ters of, 301; temperature, 302, 

 salinity, 302-303 ; diversified bot- 

 tom, 303; molluscan fauna of, 

 303-308; economic considerations 

 concerning, 308-317. 



San Joaquin and Sacramento river 

 systems, 32, 33. 



San Pablo Bay, presence of ship- 

 worms in, 29-42; physical con- 

 ditions of, 31; salinity of, 33, 35, 

 39, 42; temperature of, 36. 



San Quentin, Point, 316. 



Sars, M., cited, 172. 



Sausalito, California, 431, 435. 



Saxidomus nuttalli, 303, 308, 310, 

 313, 315, 320, 321. 



Schistosoma haematobium, 485; in- 

 termediate hosts, and larval 

 stages of, 488; cercaria of, 488; 

 position of miracidium, 509; 

 hatching of embryo, 516; ex- 

 cretory system of miracidium, 

 518. See also S. japonicum; S. 

 mansoni. 



Schistosoma japonicum, method of 

 transmission, 486; discovery of 

 intermediate host, 487; egg and 

 miracidium of, 514-518; rudi- 

 mentary spine, 514-515. 

 Miracidium, 515; extrusion of oil 

 globules, 516; hatching of em- 

 bryo, 516-517; cephalic glands, 

 518; excretory system, 518. See 



also Schistosoma haematobium; 

 S. mansoni. 



Schistosoma japonicum, Japanese 

 Blood Fluke, Cercaria of the, 

 485. 



Schistosoma mansoni, cercariae of, 

 488, 489; egg and miracidium of, 

 509-519; egg shell, 510; figure 

 of egg, 510. 



Miracidium, shape, 510; cephalic 

 glands, 511; nervous system, 512; 

 excretory system, 513; figures of, 

 517; flame cells, 513; symmetry, 

 514; figures of, 511, 512, 513; 

 extrusion of oil globules, 515- 

 516. See also S. japonicum. 



Schistosomiasis, 487, 489. 



Schizothaerus nuttalli, 303, 307, 308, 

 310, 314, 315, 320. 



Schott, G., cited, 191, 200. 



Schuberg, A., cited, 378. 



Schurig, W., quoted, 283. 



Schiitt, F., cited, 411. 



Scripps Institution for Biological Ee- 

 search (Marine Laboratory), 99, 

 151, 400. 



Scyllium, genus, 168. 

 canicula, 479. 



Scymnus lichia, 152. 



Seligmann, C. G., cited, 516. 



Setchell, W. A., cited, 175. 



Sharp, E. G., cited, 350, 352, 366, 378, 

 379, 381, 384; quoted, 365. 



Shipworm. See Teredo diegensis. 



Shipworm in San Francisco Bay, 

 California. An Unusual Exten- 

 sion of the Distribution of the, 

 27. 



Sigerfoos, C. P., quoted, 37. 



Siliqua nuttalli, 308, 311, 315. 



Smith, A. J., cited, 516, 517. 



Solen sicarius, 303, 312, 315, 320. 



Soule, H. B., U.S.N., member of board 

 for survey of San Francisco Bay, 

 300. 



South Africa, 488. 



Spinax, 168. 



Spiraulax, genus, 416, 440, 459. 



Spirostomum ambiguum,- 380. 



Spisula catilliformis, 303, 312, 320. 



Squalus sucklii, figure showing sub- 

 clavian vein and its relations, 

 480, 482, 483. 



Stefanonympha, genus, 383. 



Stein, F., cited, 368. 



Stentor coeruleus, 371, 378, 379. 

 niger, 380. 



Steuer, A., quoted, 282. 



Sthenelais, 127. 



Stockard, C. E., 210. 



Stovaine, effect of, on nerve cord of 

 earthworms, 116, 143. 



Straub, W., cited, 120, 121, 136, 142. 



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