INDEX 



427 



tion of, 283, 292, 293 ; duration of, 

 285 ; influence of light and acids on, 

 319, 320; of oxygen on, 341 ; of 

 shocks on, 99 ; of temperature on, 

 313? 3*45 localization of, 286, 287, 

 288 ; rate of, 284, 288 ; transference 

 of stimuli in, 95, 201 ; C. foetida, 

 anaerobism of, 341. 

 Chauveau, 361. 

 Chauveaud, 78. 

 Chemical actions on motile organisms, 338 ; 



energy, uses of, 405-8. 

 Chemokinesis, 6. 

 Chemonastic reactions, 85. 

 Chemotaxis, 343, 344, 353, 420 ; detailed 

 character of, 354, 355; substances 

 active in, 349 ; negative, 352. 

 Chemotropic tone, changes of, 215, 216. 

 Chemotropism, 178, 420; complex character 

 of, 179 ; discrimination by, 214 ; nature 

 of, 230; uses of, 179, 180, 181, 182. 

 Chenopodium, 258; C. album, photonastic 

 movements of, 105 ; sleep-movements 

 of, 103. 



Chilodon propellens, 299. 

 Chilomonas, chemotaxis of, 348 ; C. curvata, 

 phototaxis of, 322; C. paramoedum, 

 galvanotaxis of, 361. 



ChlamydomonaS) 307, 312, 421 ; energy of 

 cilia of, 268 ; flagellae of, 264 ; geo- 

 tactism of, 268; C. pulvisculus, chemo- 

 taxis of, 346; contact-irritability of, 

 358 ; geotaxis of, 336, 337, 338 ; photo- 

 taxis of, 323 ; C. tingenS) 420, 421. 

 Chloral hydrate, influence of, on fertiliza- 

 tion, 304 ; on nuclear division, 303. 

 Chloroform, influence of, on chemotaxis, 

 421; -- irritability, 144; move- 

 ment, 85 ; streaming, 286. 

 Chlorogonium, pulsating vacuoles of, 294. 

 Chloroplastids, changes of shape of, 330; 

 mode of reaction of, 331 ; orientation 

 of, 220, 327, 328, 329, 331, 420 ; passive 

 movements of, 286, 287, 288; perception 

 in, 1 1 ; rapidity of reaction of, 332, 333. 

 Chodat, 303. 

 Chondrioderma, 279 ; chemotaxis of, 348 ; 



pulsating vacuoles of, 295, 297. 

 Chromatin, density of, 336; influence of 



stimuli on, 89. 

 Chromatium, 320; C. Weissii, chemotaxis 



of, 346. 



Chromatophores, density of, 336. 

 Chromophyton, 293, 324 ; C. rosanoffii, 



creeping zoospores of, 265. 

 Chromoplastids, photic influence of, 332. 

 Chromosomes, origin of movements of, 302. 

 Chromulina Woroniniana, contact- irrita- 

 bility of, 358 ; geotaxis of, 337 ; photo- 

 taxis of, 323. 



Chrysanthemum, closure of capitulum of, 

 103 ; C. leucanthemum, thermonasty 

 of, 14. 



Chylocladia, photic cell-plates of, 332. 



Chytridium vorax, 324 ; locomotion of, 

 265. 



Cichorium intybus, irritable stamens of, 8l. 



Cienkowski, 293, 294, 295, 298, 304. 



Cilia, absence of, in Oscillariaceae, 273, 

 274 ; contact-irritability of, 358 ; dis- 

 tribution of, 264 ; influence of changes 

 of concentration on, 307 ; of gravity 

 on, 27, 28 ; mode of movement of, 

 265, 270 ; nature of, 269 ; reversal of 

 action of, 266, 267 ; thigmotropism of, 

 312. 



Cinematograph, use of, 233. 



Circaea, influence of gravity on photonasty 

 of, 127 ; C. lutetiana, changes of tone 

 in, 204, 206; tropism of runners of, 

 164. 



Circulation, 283. 



Circumnutation, characteristics of, 21 ; 

 general importance of, 1 1 ; in twining, 

 35, 39 ; influence of geotropic induc- 

 tion on, 28 ; periodic reversal of, 28, 



.39-. 



Cisielski, 166, 240 ; on tropism, 223. 



Cissus paulinaefolia, disks of, 47. 



Cistaceae, mode of movement of stamens 

 of, 81. 



Cladophora, 335. 



Clark, on influence of oxygen on streaming, 

 , 340. 



Claussen, 151. 



Claviceps microcephala, heliotropism of, 

 J 73> 175 ; C. purpurea, geotropism of, 

 165. 



Cleistogamy, 415 ; facultative, 97. 



Clematis cylindrica^ changes of tone in 

 205 ; C. vitalba, 44. 



Clifford, 317, 356. 



Climbers, 32. 



Climbing, uses and peculiarities of, 33. 



Clivia nobilis, 418 ; C. miniata, 418. 



Closterium moniliferum, phototaxis of, 274, 

 322, 325. 



Coal gas, influence of, on irritability, 207. 



Cobaea, absence of pits in tendrils of, 65 ; 

 C. scandens, circumnutation of, 21, 

 22 ; tendrils of, 42 ; claws of, 43, 44, 

 Fig. 10. 



Cocoa, mode of planting of, 380. 



Codiacum Wendlandi, tropism of leaf of, 

 231. 



Codium tomentosum, 324. 



Coemans, on dispersal of Pilobolus, 1 50. 



Coesfeld, 260. 



Coffee, mode of planting of, 380. 



Cohen, 347. 



Cohesion, influence of changes of, on amoe- 

 boid movement, 279, 280, 282 ; on 

 shape of protoplasmic organs, 300. 



Cohesion mechanism, 151, 152. 



Cohn, 70, 71, 81, 91, 145, 149, 287, 314, 

 324, 325, 370; on movements of 



