INDEX OF SUBJECTS 



Acanthocystis, 94, 304, 306. 



Achromatic figure (see Amphiaster), 69; 



varieties of, 78; nature, 316. 

 Achromatium, 39. 

 Actinophrys, 92, 278. 

 Actinospluerium, mitosis, 90, 94; reduction, 



278; regeneration, 342. 

 ALquorea, metanucleus, 128. 

 Albugo, 217. 

 Albumin, 331. 

 Allium, 83, 253, 267. 

 Allolobophora, teloblasts, 374. 

 Alveoli, 25. 

 Amitosis, 114; biological significance, 116; 



in sex-cells, 285. 

 Amoeba, 5; mitosis, 91; experiments on, 



343- 



Amphiaster, 68; asymmetry of, 70, 373; 

 origin, 72, 74, 316; in amitosis, 1 16; in 

 fertilization, 187, 213; nature, 316; posi- 

 tion, 375. 



Amphibia, spermatozoa, 140; sex, 145. 



Amphioxus, fertilization, 210; polar body, 

 236, 277; cleavage, 370 ; dwarf larvae, 

 389, 410; double embryos, 410. 



Amphipyrenin, 41. 



Amphiuma, 167, 261. 



Amyloplasts, 53; in plant-ovum, 133. 



Anaphases, 70; in sea-urchin egg, 106. 



Anasa, sperm-formation, 165, 271; reduc- 

 tion, 272. 



Ancylus, 368. 



Anilocra, gland-cells, nuclei, 36; amitosis, 

 116. 



Anodoiila, ciliated cells, 43, 357. 



Antipodal cone, loi. 



Aphis, 281. 



Arbacia, 192, 215, 307. 



Archoplasm, 69; in developing spermatozoa, 

 171 ; nature of, 318. 



Archosome, 52. 



Argonanta, micropyle, 133. 



Aricia, rudimentary cells, 372. 



Arion, spindle, 81 ; germ-nuclei, 207. 



Ariscema, 269. 



Ai-temia, chromosomes, 89; parthenogenetic 

 maturation, 281. 



Artifacts, in protoplasm, 42. 



Ascaris, chromosomes, 87, 301; mitosis, 80, 

 loi ; primordial germ-cells, 146; fertiliza- 

 tion, 182, 211; polyspermy, 199; polar 

 bodies, 238; spermatogenesis, 241, 253; 

 individuality of chromosomes, 295; in- 

 tranuclear centrosome, 304; centrosome, 

 31 1; attraction-sphere, 323; supernumer- 

 ary centrosome, 355. 



Aster, 68; asymmetry, 70; structure and 

 functions, loi ; in amitosis, 116; in fertili- 

 zation, 187, 213; nature of, 316; finer 

 structure, 326; relative size, 70, 373. 



Asferias, spermatozoa, 176; sperm-aster, 

 187; fertilization, 192, 210. 



Astrocentre, 324. 



Astrosphere, 324. 



Attraction-cone, 198. 



Attraction-sphere, 51, 72; in amitosis, 115; 

 of the ovum, 125; of the spermatid, 163; 

 in resting cells, 323; nature of, 323. 



Axial filament, 136; origin of, 165. 



Axis, of the cell, 55 ; of the nucleus, 36, 294; 

 of the ovum, 378, 3S6. 



Axolotl, fertilization, 192. 



Bacteria, nuclei, 31, 39. 



Basichromatin, 38; staining-reactions, 338. 



Bioblast, 290. 



Biogen, 291. 



Biophore, 245, 291. 



Birds, blood-cells, 57; spermatozoa, 138; 

 young ova, 155. 



Blastomeres, displacement of, 366; indi- 

 vidual history, 378; prospective value, 

 415; rhythm of division, 366, 389; de- 

 velopment of single, 409, 418; in normal 

 development, 423. 



Bleniiius, pigment-cells, 103. 



Blepharoplastoids, 175. 



Blepharoplasts, 173, 221. 



Braiiihipus, yolk, 153; sperm-aster, 192; 

 reduction, 256. 



477 



