SUBJECT INDEX 



Absorption curves, 1 1 

 nucleic acids, 12, 13 

 proteins, 12, 13 

 Acantharnoeba 



contractile vacuole in, 82 

 mitotis in living, 75, 84, 85, 133, Plate VI 

 effect of colchicine on, 184 

 Acanthocystis, mitosis in living, 85 

 Accessory growth factors, in tissue culture, 



176 

 Acetone, chilled, as fixative, 10 

 Achromatic figure, 92, 106, 108, no, 122 

 in Frog's egg, deprived of chromosomes, 143 

 interaction with chromosomes, 143 

 lack of knowledge concerning, 208 

 pre-metaphase effects on chromosomes, 

 1 1 i-i 14 

 Acridines, effect on nucleoli in tissue 



culture, 40 

 Acroschimus, separate spindles for each 



chromosome in, 132 

 Actinophrys, mitosis in living, 75, 85 

 Actinosphaerium, mitosis in living, 75 

 Active substance from chromosomes 

 anaphase, in, 127, 128 

 cleavage, in, 142 

 Adenine 



absorption spectrum of, 12 

 effects on mitosis 

 Allium roots, in, 198 

 tissue cultures, in, ig8, Plate XV 

 Adenosine 



effect on nucleoli in chick cultures, 40, 



Plate II 

 pre-prophase inhibitor, as, 186, 189 

 triphosphatase, in mitochondria, 24 

 triphosphate, see ATP 

 Adenylic acids, 106 



absorption spectrum of, 11, 13 

 pre-prophase inhibitors, as, 186, 189 

 (yeast) effect on mitotic rate in rat ovary, 

 189 

 Adrenal glands, growth controlled by 



gonads, 169 

 Adrenaline, effect enhanced by colchicine, 



193 

 Adult tissues, effects of extracts on tissue 



cultures, 174, 175 

 Alanine, 49 



Alcohols, higher, permeability of eggs to, 135 

 Aldehydes, liberated on hydrolysis 

 cytoplasm, in, 6 

 nucleus, in, 7 

 Allium 



heterochromatin of, 51 

 mitosis in, loi, 104 

 duration of, 84, 85, 90 

 inhibition of, 194, 198 

 nuclear membrane of, 52 



Allocycly, 44 

 Ambystoma, 78, 99 



anaphase chromosomes of, 93, 95 



nucleoli of, 42 

 Amino acids, 176 



aromatic, 1 1 



nuclear sap, in, 49 



nucleolus, in, 14 

 Aminopterin, effect on mitosis in tissue 



cultures, 186, 191, 192, Plate XIV 

 Amitosis, 1 51-154 



Frog leucocytes, in, 152 



glands of arthropods, in, 153 



Necturus erythrocytes, in, 152 



occurrence inferred, 153 



tissue cultures, in, 152 

 Ammonium sulphate, fractional precipita- 

 tion with, 8 

 Amoeba, 193 



inhibition of cytokinesis in, 198 



mitosis in living, 75 



nitroprusside reaction of, 195 



protoplasm thixotropic, 27 



spindle of, relative size, 130 



vital staining of nucleus, 53 

 Amoeboid movement, 140 



sol-gel changes, in, 138 

 Amphibia, 73 



epithelial nuclei of, 53 



heteroploid, 42, 54, 55 



mitosis in living cells of, 70, 77-78, 128 



nuclear DNA, 37 

 Anaerobiosis, effects on mitosis, 188-189 

 Anaphase, 32, 77, 92, 103, 113, 115-119, 

 127-129, 134-136, 142, 146, 148, 149, 

 186, 191, 197 



beginning sharply defined, 84 



changes in spindle during, 116, 126-132, 



143 

 chromosomes 4-stranded in, 93 

 duration of, 85 

 mitochondrial movement in Psophus, and^ 



208 

 mitotic arrest during, 196 

 spurious appearance of, 79 

 Aneuploid nuclei, 154 



Anhydrous technique for isolating nuclei, 34 

 Anisolabis, spermatocytes of, centrosomes in,^ 



1 1 2-1 13 

 Anopheles, larva of, giant chromosomes of, 62: 

 Antheridial filaments, oiChara: mitosis in, 74. 

 Anthers, cultivation of, 75 

 Anthroxanthum, position of trivalents in, 117 

 Antimony sulphide, 52 

 Antiseptics, in autolytic studies, 3 

 Arbacia 



egg of, 87, 138-139, 145, 190, 193 

 activation, 193 

 cleavage, 142 



219 



