S UBJEGT INDEX 



Carcinoma, mammary, polytene chromo- 

 somes in, 63 

 Carthamus, anthers, chromosome breaks in, 



^93 . ^ 



Caryometric analysis, 60 

 Cathepsin 



chromosomes unaffected by, 104 



nucleases associated with, 196 

 Cell plate, in plant cytokinesis, 146 

 Central body, 106-111 



Acanthamoeba, of, 75 



fibroblasts, of, 20 



permanent cell organs, as, 106, 108 



viewed in life, 108 

 Ccntrifugation 



cells and tissues, of, 25, 52 



differential, 16, 24 

 merogony and, 53 



eggs under pressure, of, 139, 140 



tissue extracts, of, 178, 179 

 Centrioles, 107-111, 123-125, 127, 129, 132 



basophilic, 1 1 1 



blepharoplasts, as, no, 122 



cryptogams, in, no 



hypermastigote flagellates, of, 92, 108 

 Centromere, 45, 91, 92, 114, 117, 123-125 



diffuse, 92, 197 



parasitic flagellates on, of, 209 



postulated charges, 209 



terminal, 91, 92 

 Centrosphere, 107, see also cytocentre 



Acanthamoeba, in, 75, 76 



fibroblasts, in, 21 



malignant cells, in, 21 

 Centrosomes, 107-111, 122, 127 



living monkey egg, in, 107 

 Cerebral cortex, phosphatases in, 17 

 Chaetopterus, egg of, 86, 108, 136 



heparin, effects of, 140 



permeabiUty changes in, 135 



spindle in polarized light, 120, 123, 

 Plate XIII 



Synkavit, effect of, 193 

 Chara, mitosis in living cells of, 74, 135 

 Chiasmata, 99 



crossing over and, 151 

 Chick embryonic cells 



tissue culture, in, 20, 21, 26, 30, 78, 116, 

 120, 128, 130, 152, 153, 185, 186, 

 197, 198, Plates I, XII-XV 

 cytoplasmic rheology of, 25-27 

 synthesis of DNA after telophase in, 102 



ultra-centrifuged, 38 

 Chilomastix, mitosis in living, 75 

 Chironomus, larval salivary nuclei of, 62, 96 

 Chloracetophenone, effects on mitosis, 186, 

 191, 192, 195, 196, Plates XIV, XV 

 Cholesterol in nuclei, 50 

 Chorio-allantoic membrane, effect of cyto- 

 plasmic particles on, 180 

 Chortophaga 



embryonic neuroblasts in mitosis, 76-77 

 cytoplasmic viscosity changes, 137 

 duration of phases in, 85, 88 



spermatocytes of, 102, 130 

 anaphase curve of, 128 

 Chromatids, 91, 92, 94, 96, 99, 1 1 1, 1 14, 191 



Chromatin, 47, 52, 75, 118, 143 



defined by Flemming, 2 



nuclease test and, 4 



threads, preparation of, 63-65 

 Chromatography, applied to nuclear sap, 



48, 49 

 Chromidia, 4 

 Chromocentres, 44 



cell in culture, of, 30 



ganglion cells in, 45 



salivary nucleus of Drosophila of, 45, 46 

 Chromomeres, 95, 97, too 

 Chromonemata, 75, 80, 92, 93, 96-97, 100, 

 103, 151 



cells in culture, 30, 33, 78 



Echinus oocyte, 31 



effect of change of tonicity on, 32 



effect of colchicine on, 193 



Frog leucocytes, 32 



guard cells of stomata, 32 



secretory cells, 32 



Tradescantia, 72 

 Ghromosin, 48 

 Chromosomin, 48 



avidity for DNA, 7 

 Chromosomes, 76-81 



absorption spectra of, 12 



assembly on metaphase plate, 78, 79, 125 



autonomy of, 127 



breaks in, variously caused, 196-197 

 in normal germination of bean, 197 



composition of, 5, 79, 1 01-106 



condition of, in interphase nucleus, 30—33 



contraction of, 73, 78, 79 



effect of mitotic poisons on, 196-198 



euchromatic regions of, 43-47 



formation during prophase, 72, 76, 78, 79 



heterochromatic regions of, 43-47 



longitudinal division and duplication of, 

 60, 78, 79, 93 



matrix of, 72, 103 



movement of, 74, 78, 79, 111-119, ^25, 127 



polytene, 43, 151 



relationship to nucleoli, 41-43 



residual orientations of, 73 



salivary, 46. 61, 92, 96-98 

 phosphatases In, 17 



sheath of, 92 



size changes in, 61-63 



spiral condition of, 72, 73, 94, 95 



structure of, 91-101 



telophase changes in, 79-80 



term due to Waldeyer, 2 

 Chymo-trypsin, 8 

 Cilia, loss of during mitosis, 133 

 Ciliates, hypotrichous, fresh formation of 



organelles during fission, 133 

 Citric acid 



method of isolating nuclei, 34 



used for studying lipoids, 50 

 Cladophora, cytokinesis In, 82, 147 

 Cleavage 



cell, 135 



absence of nucleus, in, 143 



asymmetrical, 143 



axial elongation during, 144 



hydrostatic pressure, effect of, 138 



221 



