SUBJECT-INDEX. 



629 



sexual selection, II, 269; wing 

 spurs, II, 313; outer tissue differ- 

 entiation, II, 314-5, 387; ali- 

 mentary canal development, II, 

 325, 327; muscular colour and 

 activity, II, 365-9; nutrition, II, 

 433; cost of genesis, II, 436; 

 growth and genesis, II, 454, 458; 

 heat expenditure and genesis, II, 

 468-9, 474; activity and genesis, 

 II, 470-2, 474; contrasted mam- 

 malian fertility, II, 470; eggs of 

 wild and tame, II, 478; fertility 

 of blackbird and linnet compared, 

 II, 503; Owen on skeleton of, II, 

 559, 560, 561. 



Bischoff, embryogeny of human 

 arm, I, 169. 



Bison, modifications entailed by in- 

 creased weight of head, I, 512. 



Blackbird, contrasted with linnet 

 in development, II, 503. 



Blainville, de, definition of life, I, 

 79, 93. 



Blastosphere, independence of cells 

 in Echinoderm larvae, I, 185. 



Blastula, definition of life and for- 

 mation of, I, 112. 



Blood: similarity of iron peroxide, 

 I, 17; metabolic processes, I, 69; 

 segregation of abnormal constitu- 

 ents, I, 180; protozoon life of cor- 

 puscles, I, 186-7; morbid changes, 



I, 221, 701; assimilative power 

 and organic repair, I, 221-2; res- 

 piratory tissue differentiation, II, 

 310-1; pressure in mammals, II, 

 340. (See also Vascular System.) 



Blow-fly, Weismann on nutrition 



and genesis in, I, 678-9. 

 Boers, Cape, habits and fertility, 



II, 508. 



Boismont, A. B. de, on human fer- 

 tility, II, 511. 



Bone: growth and function, I, 151; 

 adaptability, I, 230; II, 217-8; 

 function and weight, I, 308, 693; 

 mammalian cervical vertebrae, I, 

 394; evolution and vertebral col- 

 umn, I, 470-1; partial develop- 

 ment, I, 473; size of head as in- 

 fluencing, I, 512, 536-9; direct 

 equilibration and strength, I, 

 527; natural selection and co- 



adaptations, I, 614-21, 674, 677; 

 rudimentary limbs of whale, I, 

 668, 685, 692; inheritance of ac- 

 quired modifications in Punjabis, 



I, 689; skull development, II, 222; 

 theory of supernumerary, II, 223; 

 Cope on origin of vertebrate osse- 

 ous system, II, 225-7; differentia- 

 tion, II, 344-56; false joints, II, 

 370-2; Owen's theory of verte- 

 brate skeleton, II, 548-66. 



Book-worm, food of, I, 77. 



Born, G., experiments on frog-lar- 

 vae, I, 365. 



Botany, biological classification, I, 

 124, 125. (See Plants.) 



Bothriocephalus, development, II, 

 490. 



Botryllidce: development, I, 166; in- 

 dependence of components, I, 247; 

 agamogenesis, I, 641. 



Bower, Prof., on alternation of gen- 

 erations, II, 84. 



Brachiopoda, rude vascular system, 



II, 340. 



Bradbury, J. B., on vaso-dilators, I, 

 55. 



Brain: natural selection and mental 

 evolution, I, 553; analysis of sub- 

 stance, I, 596; weight in higher 

 animals, I, 598-9; size in civilized 

 and uncivilized, II, 530. 



Branches (see Morphology). 



Branchiae (see Respiratory System). 



Brass, effect of antimony on, I, 121. 



Bread, diamagnetism, I, 370. 



Breeding: heredity, I, 304-5; in- 

 and-in, I, 344-7, 353; II, 615; 

 pure and mixed, I, 354, 625. 



Bricks, changed equilibrium shown 

 by, I, 38, 42. 



Brodie, T. G., cell chemistry, I, 

 260. 



Brownell, Miss J. L., on birth-rate 

 in United States, II, 520. 



Brown-S6quard, on inherited epi- 

 lepsy, I, 312, 624. 



Bryophyllum, peculiar proliferation, 

 II, 295. 



Bryophyta, large size attained by 

 some, I, 138. 



Bryozoa, gemmation, I, 588. 



Budding (see Gemmation). 



Buds: development, I, 167-8; the- 



