464 



INDEX. 



Begonia, propagation of. 215. 



Beneden, van, on fertilization in 

 Ascaris, 180, 191, 366, 371 ; on 

 polar bodies, 218, 350, 355, 364 ; 

 on Polkorperchen, 221 ; on sper- 

 matogonia in Ascaris, 225, 387 ; 

 on nuclear division, 236 ; on 

 sexual reproduction, 289. 



Berthold, on male parthenogenesis, 



Bessels, on importance of fertiliza- 

 tion, 240. 



Beyerinck, on the formation of 

 galls, 310. 



Biorhiza, length of life of imago of, 



51- 

 Birds, length of life of, 11, 36; 



factors in duration of life of, 12. 



Blackbird, length of life of, 6, 11, 



Blaps, length of life of imago of, 



48. 

 Blastogenic characters, 426. 

 Blochmann, on polar bodies, 359. 

 Blow-flies, length of larval life of. 



Boar, length of life of, 14. 



Bombinator igneus, nature of 

 ovum of, 125, 126. 



Bombus, 54. 



Bombyees, flight of females im- 

 peded by eggs, 18; habits of, 44. 



Bonellia viridis, unequal length 

 of life of male and female, 60. 



Bonnet, on rudimentary tails in 

 dogs, 441- _ 



Born, on position of nucleus in 

 ova, 179; on double impregna- 

 tion, 394. 



Bosmina, parthogenesis of, 334. 



Brooks, on heredity, 168, 335. 



Browii-Sequard, experiments on 

 guinea-pigs, 82, 319, 321. 



Bulimus, length of life of, 56. 



Buprestis splendens, length of 

 life of, 48. 



Burdach, on the influence of ma- 

 ternal impressions on the off- 

 spring, 457. 



Biitschli, on polar bodies, 192, 

 218, 229, 350; on sexual repro- 

 duction, 289 ; on processes of 

 fertilization, 366. 



Butterflies, climatic varieties of, 

 100 ; death of, 121. 



Bythotrepbes, spermatozoa of, 

 178 ; summer eggs of, 244; win- 

 ter eggs of, 359. 



Calberla, on impregnation in Petro- 

 myzon, 178. 



Canary birds, length of life of, 

 36 : plumage of, 330. 



Carabus auratus, length of life of 

 imago of, 47. 



Carnoy, on karyokinesis in ovum 

 of Ascaris, 371, 379 ; on sperma- 

 togenesis, 387. 



Carp, length of life of, 6. 



Cat, length of life of, 6. 



Catallacta, 124. 



Caterpillars, length of life of phy- 

 tophagous, 15. 



Cells, renewal of, 21 ; nourishment 

 of, 29 ; death of, 60. 



Cephalopods, length of life of, 57. 



Cerambyx heros, length of life of 

 imago of, 47. 



Cetochilus, polar bodies of, 222. 



Chermes, parthogenesis of, 302 ; 

 galls of, 414. 



Cherry-tree, in Ceylon, 419, 420. 



Chrysomela varians, ovovivi- 

 parous development of, 49. 



Chydorus, parthenogenesis of, 334. 



Cicada, length of life of, 42. 



Cienkowsky, on conjugation, 293. 



Cionea intestinalis, length of life 

 of, 58. 



Circumcision, 447. 



Cirrhipedes, complementary males 



of, 59- 

 Clausilia, length of life of, 56. 

 Cockchafer, length of larval life of, 



16 ; length of imaginal life of, 46. 

 Coleoptera, length of life of, 46. 

 Colpoda cucullus, fission of, 150. 

 Conjugation, 289, 293. 

 Continmty of germ-plasm, 105. 

 Copepods, unequal length of life 



in the two sexes of parasitic, 59. 

 Coryne, origin of sexual bud, 209. 

 Cossus ligniperda, length of larval 



life of, 15. 

 Crayfish, length of life of, 6. 

 Cuckoo, length of life of, 11, 36. 



