SUBJECT-INDEX. 



635 



I, 309, 573; abnormal digits, I, 

 324; interbreeding of divergent 

 varieties, I, 505; decrease of jaw, 



I, 615, 693; telegony, I, 645; con 

 ditions affecting fertility, II, 474, 

 479. 



Dohrn, theory of vertebrate struc 

 ture, II, 606. 



Doliolum, combination of individu 

 alities, I, 247. 



Domestication (see Animals). 



Doubleday, E., on nutrition of gene 

 sis, II, 510-2. 



Driesch, separation of segmentation 

 spheres of Echinus ovum, I, 691; 



II, 618. 



Dropsy (see Disease). 



Droscra: individuality, I, 251; pro 

 liferous growth, II, 75. 



Du Bois-Reymond, E. H., elec 

 tricity from muscles and nerves, 



I, 50. 



Dumas, antithesis of animals and 



plants, I, 62. 

 Dwarfs, Hindu family of, I, 316. 



EAR, development of vertebrate, II, 



318, 320. 

 Earth, climatic rhythm and organic 



change, I, 499-501, 557. 

 P^arth-worm: bilateral symmetry, 



II, 199, 200; mould production, II, 

 402. 



Echinococcus (see Entozoa). 



Echinodermata: independence of 

 blastosphere cells, I, 185; proto 

 plasmic continuity in embryos, I, 

 190; separation of segmentation 

 spheres of ovum, I, 691; II, 618; 

 symmetry, II, 191, 195-6. 



Economy: of growth in natural se 

 lection, I, 536, 562; a trait of or 

 ganic evolution, II, 501, 504. 



Ectoderm: functional differentia 

 tion, I, 202, 203; functional vicari- 

 ousness, I, 209; reproductive func 

 tion, I, 281. 



Effects, Multiplication of: varia 

 tion, I, 329-30, 333; organic evo 

 lution, I, 511-4, 515, 517, 549, 

 557, II, 405-6; morphological de 

 velopment, II, 7-9, 234; physio 

 logical differentiation, II, 390-1, 

 392. 



Eggs (see Embryology). 



Eimer, T., theory of orthogenesis, 

 I, 563^. 



ElasmobrancMi: protoplasmic con 

 tinuity, I, 629; segmentation, II, 

 126. 



Electricity: genesis in organic mat 

 ter, I, 50-2, 60; muscular ac 

 tion, I, 59; incomprehensibility, 

 I, 121. 



Elephant: fertility, I, 583, 599, II, 

 459, 506; cerebro-spinal system, I, 

 598, 599. 



Elk, Irish, horns and correlated 

 parts, I, 537, 674. 



Eloidca canadensis: individuality, I, 

 248; enormous agamic multiplica 

 tion, I, 642. 



Elongation, and locomotion in ani 

 mals, II, 15. 



Embryology: as aiding biology, I, 

 125-6; simulated growth, I, 136; 

 initial and final organic bulks, I, 

 143, 158, 161; foetal flesh constitu 

 ents, I, 154; human arm develop 

 ment, I, 169; Von Baer s for 

 mula, I, 170-2, 451-4, 466: em 

 bryonic heat, I, 177; spherical or 

 ganic form, I, 177; unit-life in 

 multicellular organisms, I, 185-6; 

 functional differentiation, I, 203; 

 individuality, I, 246-7: unspecial- 

 ized reproductive tissue, I, 279- 

 83, 317; changes following im 

 pregnation, I, 283-4: nutrition and 

 vegetal growth, I, 285-8, 295-7; 

 and animal growth, I, 289-94, 

 295-7; physiological units and 

 heredity, I, 317-9; variation and 

 parental functional condition, I, 

 324; uterine environment, I, 327-8; 

 physiological units and variation, 

 I, 330-4, 458; fertilized and un 

 fertilized ova, I, 340-1: hermaph- 

 rodism, I, 341-2, 344; sociologi 

 cal parallel, I, 366-8: evolution 

 hypothesis, I, 434, 436, 453, 454, 

 555; petrel development, I, 455; 

 substitution and suppression of 

 organs, I, 456-8, 466, 472-3; struc 

 tural proclivities of physiological 

 units, I, 458; abridgment of 

 stages, I, 458-9, 464: disappear 

 ance of intermediate forms, I, 



