472 



INDEX 



Fol, on the transference of the 

 centrosome into the ovum during 

 fertilisation, 29 



Fraisse, on regeneration in Am- 

 phibia, 96; in Salamandra, 99; 

 in lizards, no, 116 



Fucoidse, polar bodies of, 25 1 



Galls, 218; definite new forma- 

 tions composed of modified cells, 

 221 



Galton, Francis, acceptation of the 

 ' gemmule ' hypothesis, but rejec- 

 tion of that of their free circula- 

 tion, 7; theory of the blending of 

 characters of parents in the chil- 

 dren, 7, 257 ; germ-substance com- 

 posed of homologous gemmules, 

 72; supposed priority as regards 

 the assumption of the continuity 

 of the germ-plasm, 198 



Gartner, on plant-hybrids, 299; re- 

 crossing of hybrids, 305 



Gemmation in Ccelerentata, 154; 

 ' blastogenic ' idioplasm, 157; in 

 Polyzoa, 158; in Tunicata, 160; 

 in plants, 163 ; comparison of the 

 process in plants and animals, 

 166; its phylogeny, 168; result- 

 ing from adaptation in polypes, 

 217; brief summary, 225, 456 



Germ-cells, their formation, 183; 

 shifting of place of origin in the 

 course of phylogeny, 186; only 

 certain series of cells contain the 

 primary constituents of germ-cells, 

 189; distinction between germ- 

 and somatic-cells, 208; the com- 

 bination of ids in germ-cells, 245, 

 247; only half the number of 

 parental ids contained in them, 



257. 457 

 Germ-plasm constituting the im- 

 mortal reproductive substance, 9; 

 is the first ontogenetic stage of 

 the idioplasm, 35; its funda- 

 mental units, 37; its composition 

 out of biophors, 40, 48; its fixed 

 architecture, 61 ; it forms a com- 

 plete unit by itself, 62; summary 

 relating to its structure, 75; 

 magnitude of its constituents, 85; 



' blastogenic ' idioplasm, 166; its 

 regular division, 171 ; accessory 

 germ- plasm, 174; its continuity, 

 183; its composition, 37, 77, 186; 

 its modification caused by am- 

 phimixis, 235; its composition 

 out of paternal and maternal 

 idants, 254; its partial variations, 

 249, 271; reversion due to its 

 ancestral determinants, 336 ; 

 transformation and the gradual 

 production of reversion, 336 ; 

 ' blastogenic ' germ-plasm, 441 ; 

 reserve germ-plasm, 447, 453 



Germ-tracks, course taken by the 

 germ-ptaim from the ovum to 

 the reproductive cell, 184; their 

 course in the Metazoa, 192; their 

 cells alone capai)le of giving rise 

 to primary germ-cells, 194; each 

 cell in them contains perfectly 

 definite somatic elements, 210; 

 brief summary, 228 



Giard, view that the polar bodies 

 correspond to aborted ova, 251 



Godron, reversion in Alelandryum 

 album and RI. rubrum, 306 



Gotte, regeneration in Salaviatidra, 



99 

 Gruber, August, artificial division 



of Infusoria, 52 

 Guignard, on the reduction of idants 



in the germ-cells of plants, 250; 



on the union of nuclei, 30 



Haberlandt, on the relations be- 

 tween the functions and position 

 of the nucleus, 46 



Hackel, Ernst, on the ' perigenesis 

 of the plastidule,' 41 ; on the law 

 of sexual transmission, 369 



Hacker, Valentin, on the phenom- 

 ena of reduction in the germ-cells 

 of Arthropods, 250 



Hemophilia, 370 



Hallez, on the embryology of 

 Nematodes, 137 



Hatschek, 53; on variation and 

 sexual reproduction, 413 



Henking, on the phenomena of 

 reduction in the germ-cells of 

 Arthropods, 250 



