410 



THE BIOLOGY OF STENTOR 



Polarity (continued) 



of membranellar band, 33 

 in mincerates, 221 

 and rate of regeneration, 201 

 reversal of, 200 

 polymorphus, 48, 56, 120, 234, 



239, 246, 259, 263, 265, 266, 



267, 268, 269, 271, 272, 273, 



274, 275, 278, 281, 287, 313, 



323, 329, 331, 337, 344, 345, 



346 

 nocturnal fission of, 346 

 Postponed division, 88 

 Preparatory period in primordium 



formation, 117, 118, 138, 223 

 Primordia 



abnormal, 184 et seq. 

 abnormal, direction of bend, 



187 

 joining of, 178 



of reversed asymmetry, 187,199 

 supernumerary, 1 80 

 synchronization of, 149 et seq. 

 V-shaped, loop or ring shaped, 



170, 186, 191 

 Primordium 



abnormal development, 164 et 



seq. 

 abortive development of, 137, 



139 

 arrested at stage 4, 132 

 completion without macronu- 



cleus, 297 

 development, 1 59 et seq. 

 deployment, 137, 163, 223 

 determination of, 170 

 in dividers, 70 et seq. 

 induction of, 193, 194 

 lengthening of, 169, 171 

 partial resorption of, 153 

 re-formation of, 138, 139 

 repair after injury, 178 

 resorption of in enucleates, 1 44, 



298 

 resorption due to injury, 145 

 resorption if nucleus reduced, 



307 



rerouting of, 152 et seq. 



shedding of, 173, 253 



stages in development, 161 



synthesis in, 257 

 Primordium site, 160, 179 et seq. 



dispensibility of, 161 



obliteration of, 210 

 Proportionality of parts 



adjustment of, 67, 75, 101, 123 

 et seq., 210 



necessity of macronucleus for, 

 127 

 Protoplasm 



changes in state of, 245 et seq. 

 Protrichocysts, 44 

 Pseudopodia in holdfast, 38 

 pygmceus, 337 



Quadruplets, 208 



Racial differences, 320 

 Radiophosphorus uptake, 74, 85, 



266 

 Ramifying zone, 65, 66 

 Rate of regeneration, 204 

 of holdfast, 110 

 in relation to level of cut, 247 

 in relation to presence of hold- 

 fast, 202 

 Recapitulation of phylogeny, 73, 



164, 176, 281 

 Recapped regenerators, 146 

 Reconstitution, 220 et seq. 

 of cell shape. 111 

 of minced stentors, 221 

 Reduction of macronucleus, 291 



305 

 Refringent bodies, 59 

 Regeneration, 105 



blockageof (by chemicals), 132, 



254, 255 

 blockage of (inhibition), 107, 



131 et seq., 190, 193, 198 

 in conjugants, 324 

 of contractile structures, 54, 



116 

 without endoplasm, 107 



