INDEX. 



-♦-♦- 



Abutilon, polymorphic flowers of, 



pp. 328, 331. 

 Acanthia lectularia, length of life 



of, 42. 

 Acineta, 153. 

 Acquired characters, meaning of, 



171 ; on supposed botanical 



proofs of transmission of, 402, 



409. 

 Acridium migratorium, length of 



life of, 40. 

 Actinia meserabryanthemum, 



length of life of, 55. 

 Actinosphaerium. 117, 118. 

 Activity and length, of life, 7, 8, 

 Adansonia, length of life of, 6. 

 Adler, on the formation of galls, 



310. 

 After-effects, 416. 

 Aglia tau, deposition of eggs, 18 ; 



length of life of, 18, 60. 

 Algae, immortality of unicellular, 



26. 

 Amoeba, length of time of fission 



of, 8 ; immortality of, 26 ; fission 



of, 26, 65. 

 Amphibia, polar bodies of, 350, 



362. 

 Amphileptus meleagris, fission of, 



150. 

 Amphorina coerulea, polar bodies 



of, 192. 

 Anabiosis, 25, 38. 

 Ancylus, length of life of, 57. 

 Andricus, length of life of summer 



generation, 50. 

 Anisotropism, 412. 

 Anlagen, 195. 

 Anodonta, length of life of, 57, 58. 



Ants, duration of life of male and 

 female, 19, 48, 51, 52, 53, 60, 157. 



Aphilotrix, length of life of imago 

 of, 50. 



Aphis, length of life of, 41 ; par- 

 thenogenesis of, 233, 296 ; polar 

 bodies of, 360. 



Apis, see Bees. 



Apus, 154, 333. 



Ascaris, 134, 146; fertilization of, 

 180 ; nuclear division in ovum of, 

 191, 237, 371 ; spermatogonia of, 

 225 ; spermatogenesis of, 387. 



Ascidians, length of life of, 58. 



Atavism, 182. 



Atrophy, of organs-, 86, 87. 



Auerbach, on fertilization, 366. 



Bacteria, in dead Cockchafer, 47. 

 Baer, von, 197 ; on the influence 



of maternal impressions on the 



off'spring, 458. 

 Balanus, polar bodies of, 222. 

 Balbiani, on nuclear division, 191 ; 



on pole-cells, 200 ; on origin of 



ova, 226. 

 Balfour, on impregnation, 177 ; on 



pola^r bodies, 218, 229, 349, 355, 



364- 

 Bear, length of life of, 14, 



Bees, length of larval life of, 15 ; 

 length of life of queen of, 19, 53, 

 158; of drones, 19,53; of work- 

 ers, 53. 60, 158; activity of, 48; 

 oviposition of, 53 ; death of male, 

 64, 121, 133; loss of limbs in 

 development of larva, 89 ; nuptial 

 flight of, 94 ; development of 

 eggs of, 230, 239, 292, 361. 



