364 



THE CELL 



Centrosomes in ovum of Ascaris, 262. 



in Phanerogams, 264. 



in pigment cells, 56. 



in Radiolaria, 212. 



female, 258, 265. 



male, 253, 265. 



multiple division of, 212, 214. 



origin of, 203. 



quadrille of, 259. 

 Characeae, nuclei of, 210. 



parthenogenesis in, 296. 



rotation in, 71. 

 Chemical stimuli. 111. 

 Chemistry of assimilation, 146. 

 Chemotaxis, 115. 

 Chemotropism , 92. 



in ^Ethalium, 115. 



in antherozoids. 119. 



in Bacteria and Infusoria, 116. 



in leucocytes, 121. 



Chief nucleus in Infusoria, 267, 269. 

 Chief spindle in Infusoria, 269. 

 Chloral, effect upon nuclear division, 210. 



effect upon ovaand spermatozoa, 113. 

 Chloroform, 113. 

 Chlorophyll, 161. 



corpuscles, 161. 



effects of chloroform upon, 113, 133. 



function of, 132, 146. 



movements of corpuscles under in- 

 fluence of light, 103. 

 Chorda dorsalis, 157. 

 Chromatic nuclear figures, 182. 

 Chromatin, 13, 181. 

 Chroraatophores, 99. 

 Chromatoplasts, 160. 

 Chromosomes, 180, 200. 

 Cilia, 77- 



formation of, 77, 83. 



movements of, 77. 

 Ciliata, fertilisation of, 265. 



galvanotropism in, 108. 



need for fertilisation of, 292. 

 Circulation in protoplasm, 71, 72. 

 Cleavage line in segmentation, 225. 

 Cleavage nucleus, 259. 

 Closterium, 279, 352. 

 Cold rigor, 96 

 Colloids, 59. 



Colour granules in plants, 162. 

 Colouring matter, absorption of by 



living cell, 136. 

 Conjugation, 278. 



epidemics in Infusoria, 26". 

 Constant current, effect upjn protoplasm, 



of 10". 



Cork formation in cell-wall, 168. 

 Coronal furrow in Frog's egg, 196 

 Corps residuel in Ascaris, 246. 

 Oorydalis cava, 308. 

 Cross-fertilisation in Acetabularia 307 



in Amphibia, 312. 



in Ciliata, 308. 



in Echinoderms, 312. 



in plants, 310. 



need for, 318. 



Crystalloids, 59. 



Cuticle, formation of, 172. 



Cutleriacese, fertilisation of, 286, 293. 



sexual affinity in, 301. 

 Cytoblast, 177- 

 Cytoblastem, 6, 177. 



Daphnoids, parthenogenesis in, 296. 

 Degeneration of animal egg-cells, 293. 



of Infusoria 267, 292,^307. 



of nuclei, 245. 



of swarm-spores of Algae, 245. 

 Desmidiaceae, 279. 

 Deutoplasm, 26. 

 Development, theories of, 339. 

 Diapedesis, 122. 

 Diastase, 150. 



Directive corpuscles, 228 (see Pole-cells). 

 Division of centrosomes, 189, 199, 259. 



of chlorophyll granules, 161. 



of egg-cell, 223-232. 



of idioblasts, 341. 



of nuclei, direct, 20". 



of nuclei, indirect, 179. 



of plasomes, 360. 



of trophoplasts, 160. . 



with reduction, 235. 



with reduction in Cosmarium, 279. 

 Division plane, position of, in division of 



egg-cell, 219. 

 Division plane, change of position 



through external influences, 355. 

 Drosera, 151. 

 Dumb-bell figure in egg-cell division, 19. 



Echinoderms, division of egg-cells of, 192. 



Ectocarpus, 295. 



Ectoplasm, 15. 



Egg-cell, division of nucleus in, 199. 



segmentation of, 223-232. 

 Electrical stimuli, 106. 

 Elementary organisms, 7, 24. 



particles, 1, 3, 24, 340, 361. 



units, 1, 3, 24, 340, 361. 

 Elemental germs, 334, 



of an organism, 334. 339, 344. 



development of, 35". 

 Embryo-sac of Phanerogams, 233, 263. 

 Endoplasm, 15. 

 Energy, kinetic. 126. 



potential. 126. 

 Epigenesis, 336. 

 Epistylis, fertilisation of, 271. 

 Equivalence of male and female heredi- 

 tary masses, 315. 

 Equivalence of nuclear substances in 



fertilisation, 272. 

 Eudorina, 254. 



fertilisation of, 289. 

 Euglena viridis, reaction of light to, 100. 



Fat, 151, 157. 

 Fertilisation, 252. 



isogamous, 284. 



merhods of. 252. 



need fur, 291. 



