480 



INDEX 



arch butterfly (illus.), 235; of 

 the prawn (illus.), 232; of silk- 

 worm moth (illus.), 236; of 

 swordfish (illus.), 239; post- 

 embryonic, 234; significance of, 

 232. 



Devilfish (illus.), 40. 



De Vries, H. H., 54, 111, 114, 146, 

 187, 192, 193; work of, on 

 Oenotheras, 157. 



Diabrotica soror, apparent determi- 

 nate variation in, 152; frequen- 

 cy polygon of variation in 

 (illus.), 152; (illus.), 153; (illus.), 

 154; variation in pattern of 

 (illus.), 134. 



Diapheromera femorata (illus.), 412. 



Dickinson, Sidney, 65. 



Didelphys virqiniana (illus.), 46. 



Dimorphism, sexual, 221. 



Dimorphodon macronyx, restoration 

 of (illus.), 293; (illus.), 294; 

 (illus.), 295; (illus.), 296; re- 

 mains of (illus.), 291. 



Dischidia, wdth ant colonies (illus), 

 378. 



Distribution, geographic, 309. 



Dog, pointer (illus.), 431. 



Dogs, prairie (illus.), 383. 



Douglas, N., 79. 



Draco (illus.), 306. 



Dragon, flying (illus.), 306. 



Drepanidae, classification and dis- 

 tribution of, in Hawaii, 124. 



Driesch, H., 278, 279. 



Du Bois, E., 462, 464. 



Diirigen, 79. 



Dyticus, fore leg of male (illus.), 73. 



Eagle, golden (illus.), 44, 



Ears of apes and man (illus.), 174. 



Earthworm, regeneration of (illus.), 

 284. 



Eastman, C. W., 292. 



Echinus, cleavage in calcium-free 

 water (illus.), 280; microtuher- 

 culatus, gastrula of (illus.) 279; 



microtuherculatus, normal larva 



of (illus.), 275. 

 Ectoblast, 228. 

 Egg cell, 224; of sea-urchin (illus.), 



248. 

 Eggs of Chrysopa (illus.), 226; of 



various animals (illus.), 225. 

 Eigenmann, C, 179. 

 Eimer, T., 55, 197. 

 Embryo, human, foot of, 460. 

 Emerson, R. W., 452. 

 Emery, C, 394. 

 Encasement theory, 2, 249. 

 Endoblast, 228. 

 Epigenesis, 276. 

 Epigenetic theory, 3. 

 Eretmoschlys imhricata (illus.), 43. 

 Ergates sp. (illus.), 41. 

 Erynnis manitoha, distribution of 



(illus.), 310. 

 Eutamia, in California, classification 



of, 117. 

 Evolution, biologic, 6; cosmic, 6; 



defined, 1; factors of, 48; in 



philosophy, 2; Lamarckian, 55; 



mechanism of, 48; orthogenetic, 



55; Spencer's definition of, 5; 



the unknown factors of, 115. 

 Existence, struggle for, 57, 60. 

 Exocoetus (illus.), 335. 

 Extra -ovates of Arbacia (illus.), 



281. 

 Eye, human (illus.), 462; pineal, of 



horned toad (illus.), 176; pineal, 



of lizard (illus.), 175. 



Factors, extrinsic, in development, 

 245; intrinsic, in development, 

 245 ; the unknown, of evolution, 

 115. 



Fauna, 316; Bassalian, 323; littoral, 

 324; pelagic, 323. 



Feeding, instincts of, 432. 



FertiUzation (illus.), 267; (illus.), 

 268; of Petromyzon fluviatilis 

 (illus.), 219. 



Fishes, adaptations of, 332; blind 



