SUBJECT-INDEX. 



627 



AngrcEcum, assimilative function of 

 root, II, 255. 



" Animal Spirits," vitalism and, I, 

 115. 



Animals: nutrition and molecular 

 rearrangement, I, 3G-7; nitrogen- 

 ous character, I, 39-41; sensible 

 motion, I, 57; metabolism, I, (>2- 

 77; multiplication of energies, I, 

 75; contrasted traits of plants and, 

 I, 196; what is an individual? I, 

 240-7; solar influence, I, 500, 550; 

 geologic changes affecting, I, 501- 



4, 549, 550, 556; interdependence 

 with plants, I, 504-6, 514, II, 398- 

 401; complexity of influences af- 

 fecting, I, 506; geographical iso- 

 lation and origin of species, I, 

 568-9; vital attributes, I, 577-9; 

 distribution and antiquity of 

 plant and animal types, II, 297; 

 mutual dependence of organisms 

 at large, II, 397-408; hypothetical 

 plant-animal type, II, 397; pro- 

 gressive increase of size, II, 401; 

 laws of multiplication, II, 411-6; 

 rhythm in numbers, II, 419; law 

 of weights and dimensions, II, 

 434. 



Animals, domesticated: variation, 



I, 324, 326, 560, 563, 693; inter- 

 breeding, I, 345-7, 354, II, 615; 

 pure and mixed breeds, I, 354, 

 625. 



Annelida: phosphorescence, I, 50; 

 axial development, I, 165, 166; in- 

 tegration, I, 363; larval forms and 

 phylogeny, I, 447, II, 115; seg- 

 mental fission, I, 588-9; seg- 

 mentation, II, 98-101, 103-4, 602- 



5, II, 107-9, 125-7; lateral gem- 

 mation, II, 105; embryogeny, II, 

 119; bilateral symmetry, II, 197- 

 200; genesis, II, 444, 453. 



Annulosa: regeneration, I, 361-2; 

 distinctive traits, I, 392; origin of 

 type, II, 98-110, 602-6; unit of 

 composition, II, 105; application 

 of term, II, 111; vertebrate sym- 

 metry compared, II, 203-6; seg- 

 mental differentiation, II, 207-9; 

 unintegrated function in Planaria, 



II, 373; development and genesis, 

 II, 464; nutrition and genesis, II, 



490. (See also Annelida and 

 Arthropoda.) 



Anthropomorphism, former preva- 

 lence of, I, 419. 



Ants: utilization of aphids, I, 660- 



I, II, 403, 405; nest-mates, II, 405; 

 castes in social species, I, 658-9, 

 670, 675; loss of self-feeding in- 

 stinct in Amazons, I, 660-1, 663- 

 4; monstrous development of Hon- 

 ey-ants, I, 683; bulk and fecun- 

 dity, II, 492. (See also Termites.) 



Aphis: iudividuality, I, 249, 250; II, 

 603; parthenogenesis, I, 274-5, 

 289; fertility, I, 582, 640-1; II, 

 476, 490; utilized by ants, I, 660- 

 1; II, 403, 405; over-multiplica- 

 tion checked by lady-bird, II, 406. 



Aquatic animals, large size attained 

 by, I, 156. 



Arachnida: avoidance of danger, I, 

 92; oviparous homogenesis, I, 271; 

 segmentation, I, 469; II, 113, 314; 

 integration and homology, II, 111, 

 121; bilateral symmetry, II, 198. 



Arcella: symmetry, II, 186; outer 

 tissue differentiation, II, 309. 



Archcgoniatea? : morphological com- 

 position, II, 32-5; growth and de- 

 velopment, II, 50-6; tubular 

 structure, II, 58, 62; alternating 

 generation not distinctive, II, 84; 

 asymmetry and environment, II, 

 140; integration, II, 293, 296; in- 

 dividuation and genesis, II, 441, 

 451, 463. 



Archenteron: primitive externality, 



II, 301; formation of coelom, II, 

 302. 



Archiannelida: segmentation, II, 

 125. 



Arenicola marina: polytrochal lar- 

 vae, II, 109. 



Arm: embryogeny of human, I, 169; 

 vicarious use of, I, 209. 



Army, morphological analogy, II, 6. 



Arteries (see Vascular System). 



Arthropoda: uniaxial development, 

 I, 165; protoplasmic continuity, I, 

 190, 629; excursiveness, I, 481; 

 limb locomotion, II, 15; integra- 

 tion and homology, II, 111-4, 121; 

 bilateral symmetry, II, 197-200; 

 genesis, II, 445, 453. 



