INDEX 



Numbers in thick type refer to pages on which figures will be found 



Achromatic figure, 21 

 A chromatin, 18 

 Acrosome, 70 

 Amitosis, in Metazoa, 25 



in Protozoa, 203, 210 

 Amphiaster, 22 

 Amphinucleolus, 5, 63 

 Anaphase, n 

 Antipodal nuclei, 213 

 Archoplasm, 21 

 Aster, 21 

 Attraction sphere, 22 



Bacteria, 201 



Basichromatin, 18 



Binuclearity in Protista, 202 



Bivalent chromosomes, 34 



Bouquet stage, 4, 33 



Bud- variation and segregation, 172 



Cell, i 



Cell membrane, 3 



Central fusion nucleus, 213 



Central spindle, 21 



Centriole, 21 



Centrosome, 4, 21 



in artificial parthenogenesis, 95 



in syngamy, 74 

 Centrosphere, 21 

 Chiasmatypie, 176 

 Chondrioconts, 195 

 Chondriomites, 195 

 Chondriosomes, 4, 195 



in heredity and morphogenesis, 196, 198, 

 199 



in spermatogenesis, 68 



relation to chromidia, 200 

 Chromatin, 18 

 Chromidia, generative, iqo 



in Metazoa, 190, 192 



in Protozoa, 207, 208 



relation to chondriosomes, 200 



vegetative, 191 

 Chromidiogamy, 208 

 Chromioles, 18 

 Chromomeres, 10, 135, 137, 175 



Chromosomes, 6, 123 



accessory, 98 



composition of, 135, 136, 137, 138 



conjugation. See Syndesis 



continuity, 12, 60, 6l, 124, 128, 129 



division, 13 



elimination, 158 



functional differentiation, 162 



heterotropic, 98 



homologous, 13, 35, 125, 126, 138 



of hybrids. See Hybrids 



individuality. See Continuity 



and Mendel's law, 168 



number, 12 



variation due to fragmentation, 142 

 variation due to fusion, 151 

 variation due to irregular mitosis, 145 

 variation due to linkage, 139, 141 

 variation due to multiplication, 147 



relation to resting nucleus, 14, 15, 16 



sex, 98 



transverse constriction, 40, 43, 136 



vesicles, 130 



Coupling of hereditary factors, 177 

 Crossing over, 176 

 Cytaster, 95 

 Cytoplasm, i 



Daughter plate, u 

 Diakinesis, 10 



Diminution of chromatin, 80 

 Diploid condition, 28 



in Aggregata, 205 



in plants, 214 

 Diplotene stage, 34 



Dispermic eggs, development, 163, 165, 166 

 Dyad, 49 



Echinoderm hybrids, 158 

 Embryo-sac mother cell, 213 

 Endosperm, 213 

 Equational division, 50 

 Equatorial plate, 10 



Fertilization. See Syngamy 



222 



