INDEX OF SUBJECTS 



Achromatic figure (see Amphiaster), 50; 

 varieties of, 57; nature, 229. 



Actinospharium, mitosis, 63, 66; regenera- 

 tion, 248. 



Adaptation, 329. 



sEqiiorea, metanucleus, 93. 



Albumin, 239, 241. 



Allolobophora, fertilization, 136; teloblasts, 

 274. 



Amphiaster, 49; asymmetry of, 51, 275; 

 origin, 49, 75, 231; in amitosis, 8i; in 

 fertilization, 134, 140, 142, 156; nature, 

 260; position, 275-277. 



Amitosis, 46, 80 ; biological significance, 82; 

 in sex-cells, 209. 



Amaha, 4; mitosis, 64; experiments on, 

 249. 



Amphibia, spermatozoa, 100. 



Amphimixis, 130, 171. 



Amphioxus, fertilization, 153, 159; polar 

 body, 176; cleavage, 270, 271; dwarf 

 larvae, 289, 307; double embryos, 308. 



Amphipyrenin, 29. 



Amyloplasts, 37; in plant-ovum, 98, 1 60. 



Anaphases, 47, 51; in sea-urchin egg, 77. 



Anilocra, gland-cells, nuclei, 26; amitosis. 

 84. 



Anodonta, ciliated cells, 30. 



Antipodal cone, 71. 



Archoplasm, 51; in developing sperma- 

 tozoa, 101, 123, 126, in 'spermatozoids, 

 108, 126; and yolk-nucleus, 121; nature 

 of, 229-231. 



Argonauta, micropyle, 97. 



Arion, germ-nuclei, 155. 



Artefacts, in protoplasm, 31, 213. 



Artemia, chromosomes, 49, 61, 205; par- 

 thenogenetic maturation, 202-205. 



Ascaris, chromosomes, 49; mitosis, 52, 58, 

 71, 78; primordial germ-cells, no, 332; 

 fertilization, 132-134, 141 ; polyspermy, 

 147; polar bodies, 179; spermatogenesis, 



180-182, 184; individuality of chromo- 

 somes, 215-218; intranuclear centrosome, 

 225; attraction-sphere, 233; supernum- 

 erary centrosome, 259. 



Aster, 34; asymmetry, 51 ; spiral, 57 ; 

 structure and functions, 71; in amitosis, 

 8i; in fertilization, 138, 157; nature of, 

 229-231; finer structure, 231, 233, 244; 

 relative size, 275. 



Asterias, spermatozoa, 127; sperm-aster, 

 140; fertilization, 143, 146. 



Astrocentre, 232. 



Astrosphere, 232. 



Attraction-cone, 146. 



Attraction-sphere, 36, 53, 54; in amitosis, 

 81; of the ovum, 119; of the spermatic!, 

 125; in resting cells, 224; nature of, 

 232-235. 



Axial filament, 99; origin of, 123. 



Axis, of the cell, 38; of the nucleus, 26, 

 215; of the ovum, 40, 278-280, 298, 319. 



Axolotl, fertilization, 131. 



Bacteria, nuclei, 23. 



Basichromatin, 27, 223; staining-reactions, 

 223, 245. 



Bioblast, 22. 



Biogen, 22. 



Biophore, 22, 183, 305. 



Birds, blood-cells, 46; spermatozoa, 102; 

 young ova, 119. 



Blastomeres, displacement of, 270; in- 

 dividual history, 273; prospective value, 

 280, 313; rhythm of division, 290; de- 

 velopment of single, 298, 307-309, 315, 

 319; in normal development, 312. 



Blennius, pigment-cells, 73. 



Branchipns, yolk, 117; sperm-aster, 142; 

 reduction, 1 88. 



Ca/anus, tetrads, 190. 

 Cancer-cells, mitosis, 68. 



365 



