Subject Index 445 



limited in animals, 56 

 liver of rat, regenerating, 44 

 octoploidy, 95 

 onion root-tip, 34 

 other methods, 57 

 percentages, 30, 34 

 jjollen tube, 37 

 progression sequence, 55 

 recovery in animals, 56 

 recovery in plants, 56 

 reiteration, 55-56 

 restitution nuclei following, 57 

 setiuences, 31 

 tissue cultures, 56 

 in Triton, 40 

 in Triturus. 40, 43, 97 

 C-pairs, 25, 48, 85, 86, 95, 114 

 /i//n/m, 25, 41,49, 79, 85, 96 

 c-anaphase stage, 49 

 chromosomes dechromatizing, 85 

 cruciform, 47, 49, 85 

 evolution of, 49 

 neuroblasts, 66, 70 

 pairs of "skis," 49 

 photomicrograph of, 37, 79, 85 

 in pollen tubes, 37, 86 

 around pseudospindle, 84, 85, 91, 96 

 relational coils, 49 

 in Triturus, 43 

 C-telophase II, 115 



conclusion of c-meiosis, 115 

 C-tinnor, 398, 416 



proportional to concentration, 105 

 Cadmium, 415 



salts, 412 

 Caffeine, synergisms \\'ith colchicine, 181 

 Callus tissue, 274 



formation of, 274 

 Camphor, 122 



Cancer, 17, 19, 255; see also Carcinoma, 

 Sarcoma 

 Ehrlich, in mouse, 258, 262, 267 

 Flexner-Joijling, rats, 261, 266 

 gastric, in man, 267 

 mammary, in mouse, 258 

 Yale carcinoma, 267 

 Cancer chemotherapeutic tests, 374 

 Cancer chemotherapy, 17, 260-65, 110 



in man, 263, 265 

 Cannabis sativa, 368 



marihuana content, 368 

 Carbohydrate metaljolism, 222 

 Carbon tetrachloride, 247 

 Carcinogenesis, 257, 269, 270 

 Carcinogenic agents, 418 

 Carcinoma 



Brown-Pearce, 265 

 Ehrlich, in mouse, 258, 262, 267 

 Flexner-Jobling, in rats, 261, 266 

 gastric, in man, 267 

 mammary, in mouse, 258 

 Yale carcinoma, 267 



Carcinoma, mammarv gland 

 in man, 2() 1 

 in mouse, 258 

 Carnation, 326 



polyploids, 326 

 Carpel development, 350 



effect of colchicine, 110, 350 

 Carrier of colcliicine, 383 

 Cartliainus tiiutorius. 110, 127 

 flowers, 110 

 Gynoecia, 110 

 ovules, 117 

 petals, 110 

 pollen grain, 115 

 pollen mother cells, 131 

 reduction, 115 

 Castration, 232 



pituitary mitoses, 232 

 Cat, intracerebral injections of colchi- 

 cine in, 179 

 Catachromasis, 44, 45 

 Cataclysmic evolution, 277-80 

 examples, 279 



origin of new species, 277, 278, 292 

 Cell ' 



permealiility, 418 

 surface changes, 202 

 type of, 81 

 Cell organites 

 centrosome, 90 

 mitochondria, 90 

 Cell plate formation in plants, 89 

 continuous fibers, 89 

 destruction by colchicine, 89-90 

 phragmoplast, 89 

 prevention, 89 

 rudimentary forms, 89 

 septa, 89 



special technique, 89 

 wheat root -tip cells, 90 

 Celosomy, 206, 208 

 Central nervous system 

 effect on, 179 

 paralysis of, 178, 179, 404 

 Centrifugal wall, 90 

 Centrifuge tests 

 Allium root-tip, 90 

 cyclosis in Elodea, 90 

 cytoplasmic, 90 

 effect on viscosity, 90 

 Centriole, 83 

 Centromere, 47, 49, 83 

 non-di\ision of, 380 

 Centrosomes, 90, 204 

 Cereals, 319 

 Cerebral edema, 178 

 I7-Cestosteroids, 197 

 Chaetopterus pergaiuenlaceus, lb 

 egg, 82 



meta])hasic spindle of egg, 76 

 Chelidonine, 255, 264, 41.3 

 Chclido)iiuiit niajus, 264 



