126 



INDEX 



eggs of, 65 ; sperm-path in, 64 



(fig.) ; symmetry, 47, 63. 

 Frontonia, 19. 

 Fuchs, K. F., 105. 



Fundulus, 97, 109 ; median eye, 110. 

 Furrow, first, and sagittal plane, 61 ; 



first, and sperm-path, 64. 

 Furrows, cross- or polar, 50. 

 Fusus, 96. 



Garbowski, M. T., 82. 



Germ-cells, 1, 23, 88 ; of Ascaris, 12 ; 

 development of, 25, 26 (fig.) ; in 

 dispermic eggs, 87 ; in fertilization, 

 27, 33, 89 ; in inheritance, 99 ; 

 maturation of, 23 sqq., 88. 



Gibbula, 96. 



Godlewski, E., 95, 97. 



Gravity, influence of, 62. 



Greeley, A. W., 40. 



Grey crescent, 7, 8 (fig.), 64, 65 ; and 

 embryonic symmetry, 47, 63 ; in 

 punctured eggs, 40, 47. 



Growth, 11, 14, 16 (fig.), 24, 25 ; ab- 

 sorption of water during, 15. 



Growth-rate, 15, 18, 22 ; measurement 

 of, 17 ; and variability, 21 (fig.). 



Gut, formation from animal frag- 

 ments, 73 ; in Echinoderms, 5 ; in 

 Frog, 10 ; in half-gastrula, 77 ; in- 

 version of, 111. 



Haemolysis, 44. 

 Half-blastomeres, 71, 72, 77. 

 Half-embryos from centrifuged eggs, 



79, 80 ; of Frog, 60 (fig.), 62. 

 Harrison, K. G., 112. 

 Harvey, E. N., 43. 

 Heat, in artificial parthenogenesis, 



40 ; effect on Sea-urchin eggs, 66. 

 Herbst, C., 49, 103, 109. 

 Hertwig, O., 62, 78, 81. 

 Hertwig, R., 37, 39, 52, 57. 

 Heterochromosomes, 94. 

 Heterogeneous hybridization, 94 sqq. 

 Hindle, E., 45. 



Hipponoe esculenta, cross-fertiliza- 

 tion, 106. 

 Hogue, M. J., 84. 

 Hyaloplasm layer in centrifuged 



eggs, 79, 80. 

 Hybrid larvae, 100, 101 ; effect of 



temperature on, 102. 

 Hydatina, centrifuged, 84. 

 Hydra, regeneration in, 77. 

 Hydrogen in hypertonic solutions, 



41. 

 Hydromedusae, 70 ; totipotence of 



eggs of, 76. 

 Hypertonic solutions, 38, 40. 



Ilyanassa, egg-fragments of, 73 ; iso- 

 lated blastomeres, 67, 68. 



Increments, growth-rate, 15, 21. 



Infusoria, 19, 33. 



Inheritance, 107 ; determinants of, 

 59, 66, 70, 86 ; and germ-cells, 99 ; 

 mechanism of, 1 ; part played by 

 nucleus in, 33, 88, 94. 



Iso-bilateral cleavage, see Segmenta- 

 tion. 



Interaction of parts, 108 sqq. 



Inversion of Frog's egg, 62, 78 ; of 

 organs in Frog, 111. 



Jelly-plasm, 27 ; in Carmarina, 71. 



Karyokinesis, 89. 

 King, H. D., 110. 

 Konopacka, B., 78. 

 Kostanecki, K., 40. 

 Kupelwieser, H., 95, 96. 



Lamellibranchs, pigment in egg of 



Cumingia, 82, 83. 

 Le Cron, 109. 

 Leech, 68. 

 Lefevre, G., 40, 46. 

 Lens formation in vertebrate eye, 



109. 



Lewis, W. H., 109, 111. 

 Lillie, F. R., 32. 69, 82. 

 Lillie, R. S., 44.' 

 Linnaea, centrifuged eggs, 83. 

 Lipoid, soluble, 42, 43. 

 Lithium salts, 109. 

 Lithodomus, 96. 

 Loeb, J., 17, 37, 40, 41, 94, 115. 

 Lyon, E. P., 81. 



MacBride, E. W., 105. 



Macromeres, in dispermic eggs, 89 ; 

 in Echinoderms, 4 ; in spiral cleav- 

 age, 51 (fig.). 



Mactra, 40, 96. 



Magnesium chloride, in artificial par- 

 thenogenesis, 38, 45 ; effect on 

 Fundulus embryos, 110. 



Masing, E., 19. 



Mathews, A. P., 40. 



Maturation of germ-cells, 23, 88 ; in 

 the Axolotl, 26 (fig.) ; in Cynthia, 

 34 ; in the Salamander, 25 (fig.). 



Mead, A. D., 40. 



Measurements of nucleus, cell, and 

 chromosomes, 56 (tab.). 



Mechanical agitation, to induce arti- 

 ficial parthenogenesis, 40. 



