SUBJECT-INDEX. 



635 



I, 309, 573; abnormal digits, I, 

 324; interbreeding of divergent 

 varieties, I, 666; decrease of jaw, 



I, G15, 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, iVl. 

 Dwarfs, Hindu family of, I, 310. 



Ear, development of vertebrate, II, 



318, 320. 

 Earth, climatic rhythm and organic 



change, I, 499-501, 557. 

 Earth-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, 563-4. 



Elasmobranchii: 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. 



Eloidea 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^, 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, 



