456 



INDEX 



Gastroderm, 



muscle processes of, 54 



of Pelnwtohydra, 53 



regeneration of, 420 



see also Endoderm 

 Gastrovascular cavity, 



fluids of, Pliysaliu, 174 



see also Lumen 

 Genotype, 



on regeneration, 401 



constancy of, hydra, 203 

 Germ cells, intercellular bridge of, 48 

 Gland cell, 1, 52 



adhesive, produces, 7 



of basal disk, 7 



cyclical changes of, 48 



double membranes of, 18 



ectodermal, 7 



ectodermal, of pedal disk, 40 



flagella of, 4 



function of, 4 



histology of, general, 4 



of hypostome, 7, 36 



metabolic gradient, relation to, 426 



mucous cell, relation to, 44 



of peduncle, 7 



secretes granules, 40 



starvation on, 48 



of tentacles, 7 



types of, 4, 48 



vacuoles of, 18 



zymogenic cell, relation to, 44 

 Glutathione, 185, 203-231 



activates feeding reflex, 205 



analogs of, 209-213 



combination with receptor, 205, 215. 

 216,218 



as natural activator of feeding reflex, 

 212 



removal of, 216 



see also Feeding reflex 

 Glutamic acid 



from C^^O., 361 



on feeding reflex, 209, 211, 212 

 Glutamyl peptides, on feeding reflex, 210 

 Glutathione analogs, on feeding reflex, 



209 

 Glutathione receptor, 204-231 passim 



specificity for glutatliione, 211 



see also Receptor 

 Glutinants, 188 



Glycogen, in extracellular space, 79 

 Glycerin, eliminates algae from C. viri- 



dissima, 259, 267 

 Glycine, in nematocyst capsule, 148 



Golgi (apparatus, complex, vesicles), 4, 



131, 1-49 passim, 77-126 passim 



contents of, 82 



in interstitial cells, 2 



in nematocyst formation, 82 

 Gorgonia, in reef building, 270 

 Gradient, 



of interstitial cells, 415 



intracellular, 341, 354 



of pCO., 358 



of pNH:;, 358 



on sexual difi^erentiation, 359 

 Grafting experiments, on hydra, 427, 434 

 Granules, 136, 146 



in ectodermal gland cell of basal disk, 

 7 



from gland cells, 40 



in intracellular space, 26, 30, 32 



in mesoglea, 26 



ril^onucleoprotein, in interstitial cells, 

 78 



in tissue culture cells, 249 

 Group effects, 



influence on halo zone, 338 



on sexual difl^erentiation, 344 

 Growth, 



of Campanularia, 297-316 passim 



of Chlorolujdra, 259-261 



of corals, 269-285 passim 



of CordylopJwra, 287-293 



of Craspedaciista, 317-336 



on heat treated food, hydra, 235 

 Growth factors, 



assay for, 236 



bioassay of, 235 



digestion of, 238 



of hydra, 235, 425-440 passim 



properties of, 238 



protein nature of, 239 



solubility of, 238 

 Growth inhibiting principle, 



attempts to show, 428-431, 434 



postulated, 427 

 Growth patterns, 



alteration of, Cordylophora, 301 



of Campanularia, 311 



of Cordylophora, 311 

 Growth rate, 



of C viridissinia, 259, 260 



of Cordylophora, 288, 290-292 



of hydra, 403 

 Growth response to administered food, 



236 

 Growth stimulating principle, 



attempts to show, 432-434 



