The Decennial Publications of the University of Chicago

0.7 per cent able absorption of water acid addition alkali amoeboid animal anions Arbacia artificial parthenogenesis back into normal beat blastulæ bring c.c. n NaCl CaCl CaCl2 calcium cause cell-division central nervous system chloride citrate concentration contained contractions occur dissociation distilled water Echinoderms effects of ions eggs of Arbacia eggs of Chatopterus eggs remained electrolytes embryo fact fertilized Fundulus glycerin Gonionemus hydrogen ions hydroxyl hydroxyl ions irritability kations KCl solution large number larvæ LiOH maturation membrane ments MgCl MgCl2 minutes mixture molecules muscle NaBr nerve normal sea-water nucleus one-tenth normal osmotic pressure oxalic oxalic acid oxygen parthenogenetic phenomena pluteus poisonous effects polyps possible potassium proteids protoplasm pure NaCl solution put back rhythmical contractions salt solution segmentation small amount sodium citrate sodium-chloride solution solu spermatozoa starfish starfish eggs sterilized stolon substances swimming tion tissues toxic trochophores twitchings unfertilized eggs