Index 



Reactions of Various Plankton Ani- 

 mals with Reference to Their 

 Diurnal Migrations, 1-83; litera- 

 ture on, 7; literature eited, 81. 

 See also Migrations, diurnal. 



Redia, 335. See also Echinostoma 

 revolutum. 



Reduviidae, 137. 



Reproduction, two types of, in Giar- 

 dia microtic, 110. 



Reproductive activity, rhythms or 

 cycles of, 88; types of, in Giardia 

 microti, 110. 



Rewa River, Fiji, occurrence of a 

 species of Sphaeroma in, 303. 



Rhysida longipes, 391. 

 simplicior, 391. 



Rhizopoda, relation to Collodictyon 

 triciliatum, 239. 



Rhodes, R. C, 201; cited, 322. 



RMzomastigina, 237. 



Rhynochomonas, 245. 



Rhythm, physiological, effect on plank- 

 ton migration, 10—12, 79; in geo- 

 tropism, 37; no evidence of, in 

 Metridia Ulceus, 54. 



Rlivthms or cycles in the Protozoa, 86. 



Richardson, H., quoted, 300, 302, 304. 



Rafter, W. B., and Holmes, S. J.. 309. 



Robin, ('., cited, 327. 



Roubaud, E., cited, 191. 



Row, R. W. H. See Cropper and Row. 



Sagitta bipunctata, 6, 76; reactions 

 of, 54, 56-64; phototropism, 58, 

 62, 69; geotropism, 58-64, 70, 73, 

 74, 76; distribution of, 64-66. 



St. John River, Florida, occurrence in, 

 of Sphaeroma destructor, 302. 



Salinity, 3; regulation of in experi- 

 mental work, 5 ; effect of varia- 

 tion in, on diurnal migration of 

 plankton animals, 14, 15, 29, 30— 

 31, 33. 



San Diego, vertical movement of 

 plankton organisms in region of, 

 4. 



San Francisco Bay, Museid larvae of 

 region, which sucks the blood of 

 nestling birds, 191-200; condition 

 of water of, 299. 



San Pablo Bay, occurrence of Sphae- 

 roma pentodon in, 299; condition 

 of water of, 300. 



San Pablo sandstone, 299 ; descrip- 

 tion of, 305 ; 310 ; plates showing, 

 opp. 312, 314, 316. 



Scenedesmus, as a food found in Col- 

 lodictyon triciliatum, 208, 212. 

 215, 221; figure showing, opp. 

 264. 



Schaudinn, F., cited, 110; 123. 207, 

 242. 



Schistosoma japonicum, 352, 356. 



Sehizotrvpanuni cruzi. 137, 139, 140, 

 146, 147, 148, 150, 151, 162; fig- 

 ures showing, 145. 



Scolopendra japonica, 391. 

 subspinipes, 391. 

 typica, 391. 



Seolopendridae, 391. 



Seripps Institution for Biological Re- 

 search, 14, 85. 



Searle, H. B., acknowledgment to, 299. 



Selenastrum, 206. 



Senn, G., 236, 237. 



Shelford, V. E., 71. 



Sialia, 198. 



"Single individual" cyst in Giardia 

 microti, 108, 110, 116, 117; illus- 

 trated, opp. 134. 



Siphonaptera, 137. 



Somatella, stages of, 113, 114, 115, 

 117, 119; absence of parabasal 

 bodies in, 121; in Crithidia eury- 

 ophthalmi, 162-165, 167, 179; 

 illustrated, opp. 184. 



South Carolina, occurrence of Sphae- 

 roma destructor in, 304. 



Spatula elypeata, 337. 



Specificity of behavior, importance of 

 study of, in plankton investiga- 

 tions. 68-71, 79, 80. 



Sphaeroma, 300, occurrence of various 

 species, 302-305. See also Sphae- 

 roma pentodon. 

 destructor, 302, 304. 

 pentodon, 299, 300 ; occurrence of, 

 305 ; description of habitat, 305- 

 306; effect on habitat, 307; labor- 

 atory experiments with, 307; de- 

 scription of activity, 308-310; 

 summary, 310. 

 peruvianum, 304. 

 quadridentatuui, 301. 

 quoyama, 303. 

 seiboldii, 304. 

 terebrans, 302. 

 vastator, 302. 

 verrucauda, 303. 



Spliaeromidae, occurrence and habits 

 of family, 300-301; of boring 

 species, 302-305. 



Spiroboloidea, 395. 



Spirostomum, 447. 



Spirostreptidarum, :i97. 



Spirostreptoidea, 397. 



Spongomonas, 206. 



Spore forms, 176; illustrated, opp. 

 190. 



Ssinitzin, D. T., theory, 344; cited, 

 355. 



Stains and killing fluids used in ex- 

 periments on Collodictyon tricili- 

 atum, 208, 216-218. 



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