218 



Index. 



Death, Weismann on the origin of, 



S, 10 ; in plants, 10. 

 Determinants, 123. 

 Direct action of environment, on 



unicellular organisms, 15, 23. 



E. 



Elsberg, theory of heredity, 2. 

 Environment, direct action of on 



Protozoa, 15. 

 Evolution, see Organic evolution. 



F. 



Flint, Prof. Austin, on Telegony, 

 204. 



Focke, on Xenia, 141, 144. 



" Formative material," and germ- 

 plasm, 56. 



Fungi, Prof. Vines on Basidiomy- 

 cetes, 90. 



G. 



G-alton. Francis, theory of here- 

 dity (stirp), 2 ; and Weismann's, 

 5 1 * 5 8 "59> 6 9> 73, 9 2 > 105-106, 

 108, 115, 129, 130 et seq.\ on 

 gemmules, 60 ; on inheritance 

 of acquired characters, 62, 69, 

 107 ; and stability of the ma- 

 terial basis of heredity, 63 ; on 

 origin of sexual reproduction, 

 103, 167. 



Gartner, on Malva, So ; on in- 

 heritance of acquired characters 

 in plants, 93. 



Gemmules, 2 ; Darwin on the 

 size of, 4 ; and germ-plasm, 52, 

 55, 58, 92, 105; and stirp, 58; 

 Galton on, 60. 



Generative cells of the Hydro- 

 medusae, Weismann on, 71, 109 ; 

 example of continuity of germ- 

 plasm, 72-73. 



Germ-cells, and body-cells, 29, 

 75—77 ; nucleo-plasm of, 30; 

 number of 43, 45. 



Germ-plasm, Weismann's theory 

 of, 5, 105, 173 et seq. ; immor- 

 tality of, 9, 24 ; continuity of, 9, 

 18, 49, 56-67, 69-70, 72, 75, 



78, 86-87, 104-105, 109-110, 

 114, 120. 16S ; differences in, 

 12; origin of, 17; indepen- 

 dence of, 19 ; and natural selec- 

 tion, 21 ; stability of, 22, 49, 

 57, 66, 86-S9, 9 I ~93> 99-100, 

 104-105, 109, 112-114, 151 

 et seq. ; lodged in nucleus, 29 ; 

 and somato-plasm, 29, 81, no; 

 the modification of, 36 ; exami- 

 nation of Weismann's theory of, 

 48 ; Weismann's theory of and 

 Pangenesis, 52; and gemmules, 

 5 2 > 55, 58, 105-106, 121; 

 multiplication of in the general 

 cellular tissues of plants, 53 ; 

 De Vrieson, 54 ; Differentiation 

 of, 55; and " formative ma- 

 terial," 56 ; and stirp, 5S-59, 

 61, 75, 106 ; and somatic-idio- 

 plasm, 69 ; as a basis of heredity, 

 70 ; ancestral germ-plasm, 1 23. 

 Grafting, and the effect of the 

 somatic-tissues on the germinal 

 elements, 81-S2 ; Darwin on, 

 83; and bud-variation, 98; 

 Weismann on, 126. 



H. 



Hackel, theory of heredity, 2. 



Hartog, Prof. M., on Weismana 

 155 ; on sexual propagation, 

 166-167. 



Healing of wounds, 34. 



Henslow, Eev. G-., on regenera- 

 tion in plants, 53. 



Heredity, various theories of, 2, 

 49,70; statement of Weismann's 

 theory of, 17; modification of 

 Weismann's theory of, 2S, 46, 

 52, 65, 68, 75, 163 et seq. ; the 

 nucleus and, 29; "carriers of," 

 32, 38, 70, 78, 122 ; theory of 

 and histology, 3S ; examination 

 of Weismann's theory of, 48, 

 105, 117; compaiison of Weis- 

 mann's, Darwin's, and Galton's 

 theories of, 51, 105-106; criti- 

 cism of Weismann's theory of by 

 Strasburger, 5 [ ; the material 

 basis of, 61, 63. 



