SUBJECT Index 



Diffusion forces 



cleavage explained by, 144 



postulated in cell, 23 

 Dinitrophenols 



reduce uptake of P^^ in Arbacia eggs, 



uncouple phosphorylation and oxidation, 



199 

 2, 6 dibromo-4-nitrophenol, 199 

 2, 6 dichloro-4-nitrophenol, 199 

 2, 6 dinitro-4-chlorophenol, 199 

 4, 6 dinitro-o-cresol, affects 

 mitosis in sea-urchin eggs, 190 

 respiration, 199 

 Diplotene, 99, 100, 102 

 Diptera, 151 



giant chromosomes in larval tissues, 

 17, 45-46, 61-62, 96-98, Plate 

 XVI 

 Dissosteira, spermatocytes of 

 micro-dissected, 97 

 polar blebs extruded, 145 

 Distribution, of nuclear size, 58, 59 

 Division, cell 



need for further comparison in animals 



and plants, 210 

 whether controlled by master reaction, 

 166 

 DNA content of nuclei, 32-38 

 changes in 



interphase, during, 38, 102, 103 

 telophase, during, 102 

 Drosophila 

 embryo of 



centrioles, 108 

 duration of mitosis in, 84 

 giant ganglion cells of, 93 

 larval salivary chromosomes, 61, 92, 98, 

 138 

 chromocentre of, 45-46 

 nucleoli of, 42 

 phosphatases in, 17 

 oocytes, ultraviolet absorption of, 15 

 ovarian nurse cells of 

 endomitosis in, 62 

 ultraviolet absorption in, 15 

 Duck, fibroblast cultures of, 173 

 Duration 



interphase, of, 88—90 



meiosis, of, 75, 90 



mitotic phases, of, 73, 82-88 



Echinarachnius, egg of 



activation of halves, 143 



bursts at poles in hypotonic SW, 145 

 Echinoderms, embryonic nuclei of, 38 



decrease in size in cleavage, 63 



heteroploidy, 53 

 Echinometra, egg of, nucleus Feulgen- 



negative, 35 

 Echinus 



merogonous plutei of, 54 



oocyte nucleus of, 31, 119 

 Ectoderm, Amphibian neural, basophilia in, 



16 

 Edestin, 13 

 Egg-cell, in plants, 70 



Eggs 



decrease in size of nuclei and chromo- 

 somes in cleavage, 63 



marine, 25, 51, 135, 184 



Echinoderms, of, 3, 25, 89, loi, 120, 

 130, 136, 188, 189, 190,200,207 



nuclear DNA compared with that of 

 sperm, 34, 35 



vertebrates, 137 

 mouse, 38 

 rabbit, 89 

 Elastic recoil in living cytoplasm, 27 

 Electron micrography 



combined with micro-incineration, 105 



dividing cells, loi, 121, 122 



nuclear membrane, 52 



salivary chromosomes, 97 



tissue cultures, 20, 22, 24 

 Electrophoresis, of embryonin, 177 

 Elements, four, 17 

 Elodea, leaves of 



cyclosis in, 149, 194 



photosynthesis in, effect of benzene, 194 

 Embryonic tissues, nucleic acids in, 13, 180 

 Embryonin, 171, 175 



'growth catalyst', as, 177 

 Endoblast, Amphibian, basophilia of, 16 

 Endomitosis 



mouse tumours, in, 151 



ovarian nurse cells, in, 62, 150 



plants, in, 151 



salivary chromosomes, in, 96 

 Energetics, vii 

 Energy-rich phosphate bonds, 199 



possible role in protein synthesis, 16 

 Enzymes 



cytoplasmic particles, of, 1 79-181 



nucleoclastic, in, 8-1 1 



nucleus, in, 49, 50 



use of in cytochemistry, 3, 10 

 Epithelia, columnar 



mitosis in, 133, 134 



nucleic acids in, 13 

 Equation of Crick, for intermitotic period, 



89-90 

 Equatorial plate, 116 



Equilibria, in spindle at metaphase, 116, 

 "7. 125 



sol-gel, 138 

 Equisetum, cenivo%ome% o^, no 

 Erythroblasts, Amphibian, mitosis in living, 



77-78 

 Erythrocytes 



Amphibia, 47, 64, 152 



birds, 17, loi 



mammals, 154 



permeability of, 185, 187 

 Ether 



permeability of eggs to, 135 



suppresses cleavage, 198 

 Ethylene glycol, permeability of eggs to, 135 

 Euchromatin, 64 



Euglypha, duration of mitosis in, 85 

 Exceptions, valued by Bateson, 210 

 Exocrine glands, 13 

 Expansion of egg surface at cleavage, 143 



begins at poles, 142 



223 



