huh X. 



San Pedro bay. aseidian species 

 in. 66. 



Seolecithrix augusta, 314, 328. 

 vorax, 314. Ml' 7. 



Seolex, of eestode, 355, 428, 429, 

 432. 



Scrippsia, 1 I. 

 pacifica, 15. 



Sea-water, density, and tempera- 

 tures, in region south of 

 San Diego bay, 196. 



Segmentation; in eggs, loss of 

 weight. 2; in Salpa chain, 

 167, 168; of stolon in Sal 

 pa fusiformis - runeinata, 

 153; in Salpa zonaria-cordi- 

 formis, 162. 



Selys-Longchamps, Marc de, 

 cited, 71. 79, 97. 



Senescence, 1. 



Sense organs, in Gyrocotyle, 417. 



Sensory ridges, in Gyrocotyle, 417. 



Septum of ooecium, 234; func- 

 tion of, 235. 



Sexual selection as affecting 

 white patterns, 308. 



Shell-glands, in Gyrocotyle, 397, 

 405. 



Significance of blocks in Salpa 

 chain, 166. 



Significance, The, of White Mark- 

 ings in Birds of the Order 

 Passeriformes, 285. 



Skilling. W. T.. 189. 



Smithsonian Institution, acknowl- 

 ergment to, 185. 



Sparsidat . 245. 



Species, habitat, differences of 

 condition in, 91 ; law and 

 order in, 85; range, in time 

 and space, 90. 



Specific characters, in branching 

 schemes, 85. 



Spencer, W. B., cited, 360, 363, 



378, 379, 380, 3H3. 401, 402, 

 note, 4114, 4(15, 409, 411, 

 412. 415. 422. 122. 



Spermatogenesis, in Gyrocotvle, 



401. 

 Spermatozoa, of Gyrocotyle, 399. 

 Spines, of Gyrocotyle, 369, 378. 



379, 384, 387; distribution 

 of, 387. 



Sponge, 91. 



Starfish, experiments with eggs 



of, 5. 

 Stevens, H. (.'., acknowledgment 



to, 94. 

 Stigmata. 79; "germs" of, 84, 



86; multiplication of, 83. 



Stimpson, W., cited. 66. 



Surface water, density of, 193; 

 occurrence and significance 

 of colder temperature in- 

 shore, 198; properties of, 

 194. 



Taenia dendritica, 395. 



Tammes, 'I'., cited, 168. 



Techinque, of trypanosomes, 128. 



Temperature, error caused by 

 heating. 198; occurence 

 and significance of color 

 inshore surface water, 199; 

 of water of San Diego bay, 

 202; table of averages of 

 San Diego region, 195; up- 

 welling of colder water, 

 2nl. 



Temperature conditions, response 

 to 1,81. 



Temperature determinations of 

 ocean and bay waters, I'.iii; 

 localities of, 190, 196; 

 method of making, 190; 

 normal relation to depth, 

 198; variations from, 198. 



Testes, in Gyrocotyle. 399. 



Thaumantias cellularia. 11. 



Thaumantiidae, 12. 



Thayer, A. H., cited. 2s7, 290, 

 201, 202, 207, 303, 304, 307, 

 309. 



Thaver, G. H., cited. 291, 303, 310. 



Thorade, II.. cited. 204. 



Tiaropsidium, n. gen., 18. 

 kelseyi, 1 0. 



Tiaropsis, 12, 18. 



Tivela stultorum, 22. 



To, Id. .1. E., cited. 285, 203. 



Torrey, Harry Heal. 11. 115. 205, 

 223. 



Tracy. Henry ('.. 285. 



Trophonucleus in trypanosoma, 

 130. 



Tristomum molae, 425. 



Trypanosoma dimorphon, Dutton 

 & Todd. Life History of, 

 127; bibliography, 139. 



Trypanosoma dimorphon, 136; 

 fission of, 131; morphology 

 and life-history of. 130; 

 types of. 136. 

 gambiense, 318. 

 lewisi, 131, 138. 

 raiae, 133. 



Trypanosomes, culture of, 130; 

 cysts formed by, 132; life- 

 history of. 128; technique 

 of, 128. 



[477] 



