INDEX 
Acetate, ethyl, fertilizing effect of, 66. 
Acids, chemical constitution and rela- 
tive physiological efficiency of, 133 
ff.; monobasic fatty, fertilizing ef- 
fect of, 67 ff. 
Acmaea, 267. . 
Activation, osmotic, of the unfertilized 
egg, 57 ff. 
Amphitrite, 12, 63, 265. 
Antedon, 293. 
Apus, 46. 
Arbacia, 18 ff., 27 ff., 50, 54, 56, 65, 
69, 71, 73, 88, 92 ff., 122, 127, 147 ff., 
159, 165, 186 ff., 194, 197, 201 ff., 
213, 219, 237, 252, 281; osmotic 
activation of, 57ff.; temperature 
coefficient, for the velocity of seg- 
mentation in, 32ff.; of oxidations 
inoos 
Arbacia punctulata, 222. 
Arbacia pustulata, 221 ff. 
Arbacia pustulosa, 26 ff. 
Arrhenius, 101. 
Artemia, 46. 
Ascaris megalocephala, 216. 
Asterias, 12, 197, 203, 281, 284; sperm 
of, used to fertilize eggs of sea- 
urchin, 225 ff., 291 ff. 
Asterias forbesii, 63, 243, 252 ff., 255. 
Asterias glacialis, 254. 
Asterina, 7, 197, 203, 216, 264, 288; 
artificial parthenogenesis in the eggs 
of, 250 ff. 
Astrospheres, formation of, 74, 124 ff. 
Auduinia, 230. 
Baltzer, 293. 
Bancroft, 16, 273, 275, 295, 304. 
Barthélémy, 45 ff., 47. 
Bases, activation of the unfertilized 
egg by, 147 ff. 
Bataillon, 217, 235, 272 ff., 299. 
Batrachus tau, 294. 
Berkeiey, Lord, 131. 
Berlepsch, von, 44. 
Blastomeres, fertilization of, 
sperm, 237 ff. 
Blood and cell extracts, foreign, ferti- 
lizing effect of, 191 ff. 
Bohn, G., 188. 
Bohr, 38. 
Bombyz mori, 44 ff., 47 ff. 
Bonnet, 43. 
Boursier, 47. 
Boveri, 3 ff., 29, 51 ff., 236, 240 ff., 303. 
with 
Brachet, 273. 
Bresslau, E., 44. 
Bufo americanus, 274. 
Builot, 265. 
Cell division, prevention of, 71, 78, 85; 
process of, 19ff., 25 ff. 
Centrosomes, formation of, 74, 124 ff. 
Chaetopterus, 4, 6, 53 ff., 63, 231, 245, 
263 
Chlorostoma, 2, 230, 294. 
Chiton, 203. 
Chorophilus feriarum, 274. 
Cleavage, process of, 19 ff. 
Cohen, 101. 
Conklin, 29 ff., 303. 
Connstein, 39. 
Ctenolabrus, 294, 297, 299. 
Cumingia, 10, 269. 
Cytological changes in the partheno- 
genetic egg, 113 ff., 123 ff. 
Cytolysis, mechanism of, 188 ff.; mem- 
brane fermation and, 173 ff.; in- 
duced, with bile salts, 177 ff.; with 
distilled water, 183 ff.; with fat- 
solvents, 181 ff.; with higher fatty 
acids, 185; with increase of tempera- 
ture, 185; with isotonic solutions, 
186 ff.; with saponin, 115, 174 ff.; 
with soaps, 178 ff 
““Cytolysis, black,” 89 ff.; white, 91. 
DeGeer, 43. 
Dehorne, 273. 
Delage, 16, 130, 170 ff., 254, 303. 
Delage’s solution, 170 ff. 
De Meyer, J., 303. 
Dendrostoma, 191 ff., 196. 
Development, affected by temperature, 
73 ff.; comparison of rate of, in pure 
and hybrid forms, 295ff.; is it 
possible without membrane forma- 
tion or without corrective factor, 
219 ff.; morphology of, 17 ff.; tem- 
perature coefficient of, 101 ff.; pre- 
vention of, by lack of oxygen, 25 ff., 
uw a; by addition of KCN, 26 ff., 
d . 
Dewitz, J., 49. 
Disintegration, after membrane forma- 
tion, prevention of, by addition of 
KCN or lack of oxygen, 26 ff., 77 f., 
85 ff.; by exposure to hypertonic 
solution, 95 ff.; of fertilized eggs, 
after treatment with aerated hyper- 
tonic sea-water, 89 ff.; process of, 
after artificial membrane formation, 
at room temperature, 74 ff.; at low 
temperature, 76 
Driesch, 240. 
Dzierzon, 43 ff. 
Echinus, 170, 188. 
Echinus microtuberculatus, 303. 
Elder, 217, 228: 
Electrical conductivity of fertilized and 
unfertilized eggs, 122 ff. 
Embryogenesis from the spermatozoon, 
303 ff. 
Erdmann, Miss, 29. 
309 
