472 



INDEX 



Fol, on the transference of the 

 centrosome into the ovum during 

 fertilisation, 29 



Fraisse, on regeneration in Am- 

 phibia, 96 ; in Sala7nandi'a, 99; 

 in lizards, no, 116 



Fucoidae, polar bodies of, 251 



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 Coelerentata, 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-plasm from the ovum to 

 the reproductive cell, 184; their 

 course in the Metazoa, 192; their 

 cells alone capable 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 Alelandrywn 

 album and M. rtibrum, 306 



Gotte, regeneration in Salaniandr-a, 



Grul)er, 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 



Haemophilia, 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 



