Subject Index 455 



Homogametic, 354 



in sex determination, ^r>\ 

 Homologous chromosomes, i \'J. 

 Homologous serum, 378 

 Honey poisoned l)y Colchiciuii. 109 

 Hormicliitm, 119 



leukophytic variant of, 124 

 Hormones 



androgenic, 232, 235 



estrogenic, 214, 226, 232 



experiments on growth and, 226-27 



gonadotropic. 191, 226. 227 



mimetic actions, 190 



ovarian hormones, 226 



ph\ lt)liorm()nc: sec Plants 



jMtuitary, 228; see also Hypophysis 



sex, 230-31 



stimulated growth, 224-27, 379 



test of estrogenic, 19, 214 

 Husson, 13 



Hyaline globule, 66, 68, 79, 80, Rl. 193, 

 394; see also Aciiromatic sphere. 

 Deformed spindle, Pseudospindle 



change of spindle form. 78-81 



diagram of, 70 



in neuroblasts, 66, 70. 78-81 



non-fibrous, 68 



photomicrograph of, 6() 



similar to pseudospindle, 80 

 Hydrodictyon, 119 

 Hydrogen bonds, 408 

 Hvdrogeuation, 161 

 Hvdrolvsis to colchiceine. 160 

 Hydrostatic pressures. 399 

 Hyocyamus niger, 346 

 Hyperglvcaemia, 193 

 Hyperthvroidv, 229 

 Hypertrophy, 124. 236 



iniilateral, of kidney, 241 

 Hyphae, 124 

 Hypocotyl, 102 



cortex, 105 



swelling, 105 

 Hvpophysectomy. 190 

 Hypophysis, 177, 220, 226 



in carbon-tetrachloridc poisoning, 248 



mitoses in, 241 

 in pregnancy, 230 

 Hypothesis, Ax B. 278 



'Winge's, 278, 307 



I 



Index for induced tetraploidy. 319 

 counting cinomosomes. 320 

 criteria forjudging. 362-71 

 floral parts, 320 

 pollen size, 319 

 seed size, 319-20 

 sprouting ability, 320 

 vegetative characters. 320 



Indian Pharmacopoeia, 8 



Indole acetic acid, 109 

 Indolebutyric acid, 104 

 Inhibition, 33-34 

 iTijcctions, 188 

 J-Inositol, IK). 117 

 wcvo-Inositol, 101, 416,417 



role of temperature, 104 

 me50-Inosose. 417 

 Insect resistance, 311 

 Insulin, 244 



and Langerhans' islets mitoses, 241 

 "Intactncss period" of chromosomes, 92 

 Intergeneric amphiploid, 299 

 Intergeneric hybrid, 279, 309 

 Intergenomal exchange, 292 



no pairing between genomes, 293 

 Interkinesis. 417 

 Interphase, 50, 78; see also Mitosis 



c-pairs enter, 108 



duration of, 380 



loss of chromaticity, 45, 50. 70. 85, 95 



micronuclei of, 44 



processes, 31, 50-52, 75, 95 



prophase to, 32, 70 



transformation to, 30, 75, 79 



unraveling, 50, 85 



yesicidating stages, 45, 51, 85, 95 

 Interspecific hybrids, 278, 293 



Brassica, 309-10 



classification problems, 280-81 



Cucurbit a, 311 



diploid, 293 



Galeopsis. 310 



in Gossvpiuin, 302-6 



in Gramineac. 294-302 



in Nicotintia, 307-9 



Ribes, 312 



Solanuni, 31 1 



Tri folium. 312 

 Interspecific segregation, 285, 293, 308, 



311, 312 

 Interspecific trisomies, 306 



tetrasomics, 306 

 Intervarietal 3X hybrids, 332 

 Intestinal crypts, 376 

 Intestine, 181, 196 



elimination of colchicine bv, 196 



hemorrhage, 181 



mitosis, 265 



nnicosa. 



iO 



Intoxication, chronic, of mice, 193 

 Intracerebral injection, 179 

 Intramedullary injections of colchicine. 



in man, 264 

 Intranuclear orientation, 33 

 Intraperitoneal injections of colchicine, 



377 

 Intraspecific trisomies, 306 



tetrasomics, 306 

 Invertasc. 397 

 Invertebrates, 54, 375, 377 

 lodoacetamide, 412, 415 



