INDEX 



Generic names are indicated by italics; page reference to figures are indicated by bold face 



type, i.e., 165. 



Abdomen, 322, 334, 344. 



Abiogenesis, 195, 202. 



Absorption, of food, 86, 354; of 



oxygen, 92; theories of mechanism 



of, 88. 

 Acanthocephala, 241. 

 AchatineUidse, 563. 

 Achorutes, 372. 

 Achromatic figure, 137. 

 Acrania, 36. 

 Acris gryllus, 16. 

 Adinophrys, 154, 155, 165. 

 Actinopoda, 154, 165. 

 Actinozoa, 241, 274, 278, 279, 280. 

 Activation, 234. 

 Adaptations, 24, 26, 304. 

 Adipose tissue, 145. 

 Adjusters, see Neurone. 

 Adrenal bodies, 47, 99, 100. 

 Adrenalin, 47, 99. 

 ^quorea, 278. 

 Agassiz, 502, 548. 

 Air-bladder, 45, 63. 

 Air sacs of locust, 355. 

 Allantois, 431, 432. 

 Allelomorphs, 474, 485. 

 AUigator, 37, 422, 424. 

 Alternation of generations, 275, 277. 

 Alveolar glands, 142. 

 Amino acids, 74; absorption of, 88. 

 Amitosis, 136, 137. 

 Ammonites, 513. 

 Amtnophilia, 389. 

 Amnion, 431, 432. 

 Amoeba, 154, 155, 156, 157, 158; 



behavior of, 158; metaboUsm of. 



159, 162; reproduction and life- 

 cycle of, 163. 

 Amoeboid movement, 145, 157. 

 Amphiaster, 137. 

 Amphibia, 10, 14, 28; classification 



of, 11, 37, 241. 

 Amphileptus, 189. 

 Amphimixis, 235. 

 Amphineura, 241. 

 Amphioxus, 13, 36, 397, 398, 399. 

 Amplexus, 400; see also Sexual union. 

 Amylopsin, 85. 

 Analog^', 246. 

 Anaphase, 139. 

 Anasa tristis, 379. 

 Anatomy, 2, 3, 4, 499. 

 Ancestral inheritance, 458, 

 Andalusian fowl, inheritance in, 467, 



468. 

 Animal biology, 2. 

 Animal Kingdom, 14, 237, 240, 241, 



282. 

 Anisogametes, anisogamy, 174. 

 Annulata, body plan of, 246, 314; 



classification of, 238, 240, 241, 309; 



sensory-neuromuscular system of, 



317. 

 Anopheles, 386. 

 Anosia plexippus, 380. 

 Ants, 375, 393, 394, 395. 

 Antennae, of crayfish, 322, 328; of 



locust, 346, 348. 

 Antennules, 322, 328. 

 Antero-posterior differentiation, 244. 

 Anthophysa, 196. 

 Anthropoid apes, 529. 



567 



