367 



Nucleus segments, number of, in division 

 with i-eduction, 235. 



spindle, 180. 



spindle, derivation of, 200, 202. 



spindle, formation of, 185. 



staining of, 40. 



structure of, 44-54. 



transmitter of hereditary elemental 



germs, 344. 

 Nutrient plasm, 349. 



solutions, 147, 294. 



substances of the cell, 27. 



(Edogonium, 34. 



Onychodromis grandis, 253, 271, 293. 

 Oogamous fertilisation, 284. 

 Oogonium, 287, 302. 

 Osmosis, 138. 

 Over fertilisation, 243. 

 Over mature egg-cells, 293. 

 Ovists, 337. 

 Ovocentrum, 258, 274. 

 Oxygen, action upon ^Ethalium, 115, 

 128. 



action upon Bacteria and Ciliata, 

 116, 117. 



action upon cells, 112. 



Pandorina, 254. 



fertilisation of, 287. 

 PangeiuB (de Vries), 340, 359. 

 Paugenesis, 340. 



intracellular, 359. 

 Paramaecia, need for fertilisation of, 267. 



need for oxygeu of, 117. 

 Paramitome, 23. 

 Paranuclein, 42, 257. 

 Paranucleus of Ciliata, 267, 269. 

 Paraauclear spiudle, 269. 

 Paraplasm, 26. 

 Parthenogenesis, 255, 295. 

 Pelomyxa. 99. 

 Pepsin, 351. 

 Perforated nuclei, 210. 

 Periclinal division walls, 220. 

 Peripheral layer of protoplasm of the 

 cell, 15. 



of Frog's eggs, 15. 



role of in osmosis, 140. 

 Permanent material of the cell, 27. 

 Peronosporeaj, sexual affinity in, 302. 

 Phseosporese, fertilisation of, 23(i. 

 Phagocytes, 143. 

 Phagocytosis, 143. 

 Puotophobic spores, 102. 

 Photophylic spores, 102. 

 Phototonus, 101, 102. 

 Phylloxera, 295. 



Physiological units (Spencer), 340. 

 Phytogenesis, 3. 

 Pigment granules, 158. 

 Pill-box theory of development, 338. 

 Plane of division, position of, in egg-cell, 



219. 



Plant anatomy, 2. 

 Plasmic products, 27, 154. 



Plasmolysis, 140. 

 Plasmodium, (58. 



light-stimulation of, 99. 

 Plasomes, 360. 

 Plastidule, 342. 

 Plastin, 17. 



reaction of, 17- 

 Podophrya gemmipara, 229. 

 Polar area, 184. 



differentiation, 214. 

 Pole cells, 228, 237, 269. 



of parthenogenetic ova, 298, 299. 

 Pollen grains, 263. 

 Pollen tube, 264. 

 Polyaster, 243. 

 Polyspermia, 114, 243. 

 Preformation theory, 336. 

 Primordial utricle, 32. 

 Pronuclei, 275. 

 Proteid substances, 17- 

 Protoplasm, adventitious substances in, 

 34. 



alkalinity of, 17 



chernico-physical and morphological 

 properties of, 11. 



death from cold of, 95. 



double refraction of, 18. 



first use of the word, 6. 



formation of, 16. 



history of protoplasmic theory, 6. 



of Amoeba, 28. 



of lymph corpuscles, 28. 



of Myxomycetes, 28. 



of Reticularia, 23. 



structure of, 18. 

 Protoplasmic movements, 68, 73-89. 



due to heat stimulation, 94. 



due to light stimulation, 99. 



metabolic products of, 18. 



of Amoebae, 67- 



of flagella and cilia, 77. 



of Gromia oviformis, 69. 



of lymph corpuscles, 66. 



of Myxomycetes, 67. 



of plant cells, 71. 



simulated by drops of oil, 73-77. 



theories concerning, 73. 

 Protoplasmic threads, 23, 31. 

 Pseudopodia, 27, 28, 29, 66, 110. 

 Pteris cretica, 300. 

 Ptyalin, 151. 

 Pyreuin, reaction of, etc., 42. 



Quadrille of the Ceutrosomes, 259. 



Radiation figures in Echiuoderm eggs, 



192. 



figures in protoplasm, 55, 181. 

 Radiokjria, 212. 

 Receptive protuberance, 237, 304. 



spot in Algaa, 2>i6. 

 Reduction of nuclear segments, 262, 264, 



265. 

 of nuclear segments in Ciliata, 



270. 

 Regeneration, 346. 



