Index 



405 



Germinal tracks, "Keimbahnen," 

 283. 



Germinal zone, 74. 



Germs, Gallon's, 145. 



Germs, preformistic (see prefor- 

 mistic germs.) 



Germ cells, 83, 84, 189, 228-231, 

 252, 254, 257, 258. 



Giard; parasitic relation of off- 

 spring to parent, 378; brood- 

 ing, 379; lactation, 380; ma- 

 ternal affection, 381. 



Giraffe, 198. 



Goethe, nature of flowers, 72. 



Goldstein, Kurt ; influence of the 

 central nervous system on de- 

 velopment, 76. 



Gorilla, 13. 



Graf, leech, 125. 



Grafts, 89, 90, 117. 



Gregariousness caused by habit, 

 383- 



Gromia oviformis, 42. 



Gros (see Durand de Gros). 



Gruber ; division of infusoria, 

 54, 58; stentor coeruleus, 54, 

 55; unicellular and pluricel- 

 lular organisms, 60. 



Guinea pig, inheritance of the 

 effects of injuries in, 166. 



Haacke; theory of inheritance, 

 228. 



Haase, H. ; regeneration in Tubi- 

 fex rivulorum, 140. 



Habit, origin of affective tenden- 

 cies, 378; influence of, 384. 



Haeckel; perigenesis, 259; his 

 theory, 259, 314; mnemonic 

 character of plastidules, 316. 



Haeckel's biogenetic law (see 

 biogenetic law). 



Hammar ; communications be- 

 tween the cleavage cells of the 

 sea urchin egg, 39. 



Hansemann ; nuclear division, 

 355- 



"Harmonicity" of Vochting, 89. 



Hartmann, Eduard von ; doctrine 

 of descent, 196. 



Hartog, Marcus, 353. 



Heidenhain ; intercellular bridges 

 between cells of different tis- 

 sues, 40. 



Helleborus niger, 247. 



Hemitherium anterius, 63. 



Hensen; memory, 324. 



Herbst ; sea urchin, 80 ; epigen- 

 etic theory, 246. 



Hering; the phenomenon of 

 memory, 3i6ff; the nervous 

 substance as the preserver of 

 memories, 321, 375. 



Heritage (all that is inherited), 

 77, 85, 237, 246, 274, 275. 



Hermaphroditism, 366. 



Hermit crabs, 181. 



Hertwig, Oscar; embryonal 

 organs without function, 12; 

 transmission of the stimulus 

 for membrane formation, 32 ; 

 transmission of nuclear stim- 

 uli, 42; gastrular invagin- 

 ation, 75, 87; frogs' eggs, 80; 

 shifting the blastomeres, 81 ; 

 hereditarily equal division, 81, 

 82; double gastrular imagina- 

 tion, 87; organization of the 

 egg, 97; causes of the specifi- 

 city of development, 106 ; galls, 

 124; new formations, 136; bi- 

 ogenetic theory, 233 ff; rejec- 

 tion of biogenetic law of 

 Haeckel, 242 ; specific action of 



