INDEX 



A. 



ABBREVIATION of ontogeny, 273. 

 abiogenesis, 214 216. 

 Acacia pycnantha, seedling, Fig. 132. 

 acacias, life-history, 280. 

 Acanthodes, 291, Fig. 138. 

 accessory chromosomes, 135. 

 accessory idioplasm, 167. 

 accretion, 20. 

 achromatic figure, 74. 

 acquired characters and human 

 progress, 427. 



,, ,, Bordageon,182. 



,, ,, Brewer on, 178, 



180. 

 , , , , Brown - Sequard 



on, 180. 

 ,, ,, Buffon on, 367, 



368. 

 ,, ,, Charles Darwin 



on, 180, 393. 

 ,, ,, de Vries on, 



414. 

 ,, ,, Eigenmann on, 



183. 



,, ,, Erasmus Dar- 



win on, 372. 



Henslowon,183 



,, Herbert Spencer 



on, 185. 



,, Hilgardon, 178. 



,, ,, inheritance of, 



165, 169, 176 

 193, 404. 



,, ,, Lamarck on, 



379, 380, 382. 



,, ,, meaning of 



term, 156, 176, 

 177. 



,, ,, Sumner on, 182. 



,, ,, Weismann on, 



176, 179. 



actinula larva, 122. 

 activity of male, 84, 85. 

 adaptation, 235, 365. 



and design, 212. 

 ,, ,, fluctuating varia- 



tion, 414, 415. 



adaptation and mutation, 414, 415. 

 ,, ,, natural selection, 



396, 404, 405. 

 ,, average, 184. 

 ,, co-operation of factors in 



bringing about, 405. 

 ,, embryonic, 267 

 ,, Erasmus Darwin on, 



372, 373. 

 ,, in animals, 334 349. 



individual, 184. 

 ,, in inorganic world, 395. 

 ,, in leaves of acacias, 280. 

 in plants, 350363. 

 mutual, 414, 415. 

 ,, origin of, 183. 

 ,, resulting from survival 



of fittest, 391. 

 ,, Robert Chambers on, 



383, 384. 



.adipose tissue, 56, Fig. 19. 

 aesthetic development of man, in- 

 fluenced by insects, 364. 

 aesthetic sense, in courtship, 349. 

 affinities, natural, 228, 229. 

 after-effects, 191. 

 age of habitable earth, 285 287. 

 age of ocean, 287. 

 aggregate species, 224. 

 aggressive resemblance, 337. 

 Agnatha, 290. 

 Agnostns princeps, Fig. 134. 

 air-bladders of Fucus, 99. 

 air-breathing vertebrates, origin, 



256. 



ala spuria, 305. 

 albumen, 23. 

 alcoholism, 157. 

 alimentary canal, 124. 

 allantois, 270. 

 allelomorphs, 200, 206. 

 aloes, 350. 



Alpine plants, 181,262,350. 

 Alps, Arctic vegetation on, 333. 

 alternation of generations, 101. 

 in aphides, 144. 

 in ccelenterates, 121. 

 in ferns, 101106. 

 in flowering plants, 106 112. 



