320 



Roux : cytotaxis, 55. 



cytochorismus, 45. 



cytarme, 45, 53. 



cytolisthesis, 53. 



'Framboisia', 135. 

 Rusconi : electric currents, 91 . 



Sachs : law of direction of cell 



division, 28. 

 Sala : fertilization processes altered 



by cold, 108. 



fusion of the eggs of Ascaris, 202. 

 Samassa : effect of pure oxygen at 



high pressures on the Frog's egg, 

 114. 



effect of lack of oxygen on the 

 Frog's egg, 119. 



effect of various gases on the eggs 

 of A&caris, 112. 



development of animal cells of 

 Frog's egg, 173. 



Schaper : development of tadpoles 

 after removal of brain and eyes, 

 175. 



cause of differentiation of lens, 

 275. 



Schulze, F. E. : segmentation of 



Sponges, 22. 

 Schulze, O. : gray crescent of Frog's 



egg, 80, 247. 



gravity and the Frog's egg, 86. 



effect of low temperatures on the 

 Frog's egg, 100. 



first furrow and sagittal plane in 

 Frog's egg, 165. 



double monsters from Frog's egg, 

 171. 



Seeliger : hybrid Echinoderm larvae, 



260, 269. 

 Selenka : first furrow and sagittal 



plane in Echinoids, 250. 

 Semper: rate of growth in Limnaea, 67. 

 Smith : Peltogaster, 24. 

 Sollmann : after effects of hypertonic 



solutions, 124. 

 Spetnann : development of constricted 



Newt's eggs, and embryos, 174, 175. 



causes of formation of lens and. 

 cornea, 275, 276. 



Sumner : injuries to blastoporic lip 



of Teleostei, 178, 246. 

 Sutton: individuality of chromosomes 



in Brachystda, 256. 

 Swammerdam : pre format! on, 14, 15. 



Vejdovsk^ : unequal centrosomes in 

 dividing pole-cells, 31. 



polar rings in Rhynchelmis, 251. 

 Vernon : rate of growth in Strongy- 



locentrotus, 67, 70. 



Vernon : alteration of variability in 

 Echinoid larvae, 71, 74. 



effect of light on Echinoid larvae, 

 95, 96. 



effects of change of temperature 

 on Echinoid larvae, 106, 107. 



change of variability produced 

 by heat, 107. 



and by chemical agency, 141, 156. 



poisonousness of carbon dioxide 

 to Sea-urchin eggs, 112. 



characters of hybrid Echinoid 

 larvae, 261. 



Verworn : behaviour of Protozoa in 

 an electric current, 93. 



regeneration in Protozoa, 254, 

 note. 



Walter, see Endres and Walter. 

 Weber : law of stimuli, 272. 

 Weismann : qualitative nuclear 

 division, 19, 297. 



idioplasm, and reserve-idioplasm, 

 159. 



Weldon : growth-rate in Carcinus, 71. 



change of variability in Carcinus, 

 72. 



in Clausilia, 73. 



Wetzel : double monsters from 



Frog's egg, 172, 245. 

 Whitman : polar rings in Clepsine, 



251. 

 Wierzejski, see Kostanecki and 



Wierzejski, 250. 

 Wilson, C. B. : malformations of 



Amphibian embryos, 120. 



acclimatization to salt-solution, 

 136. 



Wilson, E. B. : segmentation of Am- 

 phioxus, 26. 



segmentation of Renilla, 55, note. 



unequal centrosomes in dividing 

 pole-cells, 31. 



pressure experiments on eggs of 

 Nereis, 39, 213, 240. 



cytology of artificial partheno- 

 genesis, 124. 



development of isolated blasto- 

 meres in Amphicxus, 179, 180. 



isolated blastomeres of Cerebratulus, 

 and fragments of blastulae, 205, 

 206. 



isolated blastomeres of Patella, 

 218-222. 



of Dettialium, 225, 226. 



removal of polar lobe, 224. 



effect of fertilization, 222, 223. 



development of egg-fragments, 

 226, 227. 



