466 



INDEX 



Symbiotic algae, 



role of, 



in contributing carbon to host, 255, 



259 

 in reclaiming nitrogen, 259 



on survival of C. viridissima, 261, 262 

 Synchronous development, 



of cnidoblasts, 48 



of interstitial cells, 80 



of nematocysts, 45, 81 

 Synchrony of peristalsis, in Cordijlophora, 



289, 293 

 Syncytia, 10, 14 



of cnidoblasts, 3, 45 



disappearance of, 3 



of interstitial cells, 2 



Temperature, 



on budding seciuence, Craspedaciisto, 

 318, 320-325, 330-334 



on feeding reflex, hydra, 223, 229 



on food reserve, Craspedacusta, 326 



on growth patterns, Campamdaria, 301 



on medusa budding, Craspedacusta, 

 318 



on regeneration, hydra, 405 

 Tentacles, 



acid phosphatase of, 384, 386 



cell cleath in, 436 



cnidocyte of, 30, 32 



histology of, general, 7 



5-hydroxytryptamine of, 180 



joins hypostome, 38 



number of, 354 



number regenerated, 400 



regeneration of, 416, 417 

 Terminal bars, 6, 20, 62 



between epithelial cells, 51 



function of, in mammals, 66 



nomenclature of, 65, 66 



see also Desmosomes 

 Tetramethyl ammonium, see Tetramine 

 Tetramine, 180, 181, 185 



action of, 181, 185 



distribution of, 180 



in hydra extracts, 181 



occurrence of, 185 



paralyzing action of, 180, 181 



a poison, 181 

 Thecate hydroids, 297 



development of, 299 

 Thorns, of nematocyst tube, 84 

 Thorotrast, 253 



Time-lapse movies, 



of Campamdaria, 376, 380, 392 



of Cordylophora, 288 

 Tissue culture, of A. ele^antissima cells, 



245-254 



maintenance of, 245 



methods for, 245, 246 

 Toxin, 158, 179-186 



of A. elegantissima, 177 



amino acids of, Phtjsalia, 173 



bioassay of, Phijsalia, 173 



chemistry of, hydra, 153 



defined, 155 



heat on, hydra, 182 



of hycb-a, 182 



isolation of, 

 hydra, 156 

 Phijsalia, 169-178 



lethal dose of, PlnjsaV.a, 182 



location in stenotele, 133 



of Metridium acontia, 182 



of nematocyst, 194 



of nematocyst, Phijsalia, 169, 173 



origin of, Phijsalia, 173, 175 



peptides of, Phijsalia, 173 



pharmacological action of, Phijsalia, 

 178 



physical properties of, 181 



potency of peptides of, Phijsalia, 174 



proteases, destroyed by, 181 



protein nature of, 180, 181 



see also Inhibitor, of succinoxidase 

 activity 

 Trembley, Abraham, 131, 441 

 Trigonelline, 180 



Trypan blue, to stud\- Cordylophora de- 

 velopment, 292 

 Tube, of nematocyst, 81-85, 110, 118, 



132, 133 



site of fonnation, 126, 127 

 Tuhularia, 



action potentials of, 293 



regeneration of, 355 



Uprights, Cordylophora, 287, 290-292 



Vacuoles, 8 



in gland cell, 4 

 ViUi, 4 



of pedal disk, 7 

 Volvent, 189 



see also Desmoneme 



see also Nematocvst 



