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, 314; 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. 



Ckilomonas, chemotaxis of, 348 ; C. curvata, 

 phototaxis of, 322; C. paramoecium, 

 galvanotaxis of, 361. 



Chlamydomonas, 307, 31-2, 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, cha/iges 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, II ; 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. IVeissii, 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, Si. 



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. 



Circaeci) 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 i 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, 8l. 



Cladophora, 335. 

 Clark, on influence of oxygen on streaming, 



34. 



Claussen, 151. 

 Claviceps microcephala, heliotropism of, 



J 73> J 75 j C. purpurea, geotropism of, 



165. 



Cleistogamy, 415 ; facultative, 97. 

 Clematis cylindrical, changes of tone in 



205 ; C. vitalba, 44. 

 Clifford, 317, 356. 

 Climbers, 32. 



Climbing, uses and peculiarities of, 33. 

 Clivia nobilis, 418 ; C. mini at a, 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, 150. 

 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, 8l, 91, 145, 149, 287, 314, 



324, 325, 370; on movements of 



