SUBJEOT-IJ<JDEX, 



597 



Tyndall, Prof. J., on heat absorption by 



v^ater vapour, 1, "7. 

 "Types, persistent," Iluxley on, 1, 



824-6. 



CTroiiE, dermal structure, S, 280, 



Vli-a : cell multiplication, 2, 18 ; outer 

 tifsue, 2, 239. 



Vmhdiiferce : floral symmetry, 2, 156 ; 

 axial and foliar organs, 2, 511-6. 



LTnils: difEerentiation and dissimilarity, 

 1, 21 ; segregation and organic repair, 

 7, 177-9, 179-82 ; chemical, morpho- 

 logical, and physiological, i, 182-3 ; 

 6t:ibility, 1, 275 ; instability and hi'te- 

 rogeiieity of organic, 1, 237 ; morpho- 

 logical composition, 2, 5. 7-9, 13, 75, 

 77 ; pb^nogamio, 2, 69-71, 136 ; 

 annulose, 2, !17 ; incident force and 

 homologous, S, 144; morphological 

 summary, S, 215. Physiological, (see 

 Physiological units) . 



Unknowable, the, manifestations of, 1, 

 491. 



Unsj mmetrical, definition, 2, 116. 



Van Beneden, P. J., on tcinm, S, 93. 



Variation : Struthei-s on digital, 1, 258- 

 60 ; effects of parental condition, /, 

 260-2 ; of altered function, 1, 202-4, 

 270-2; "spontiincous," 1, 26)s 272, 

 425, 480; ^, 500; dissimilarify of 

 initial condiiions, 1, 264-7, 267-8, 269- 

 70 J persistence of force, i, 271 ; phy- 

 siological units, resume^ i, 28{i-91; 

 equilibration and vegetal, 1, 437-9; 

 equilibration of favourable, 2, 387. 



Vascular system : nutrition, i, 118, 

 120 ; development, 1, 140 ; function, 

 2, 154^6 ; of mol/usca, 1, 158 ; func- 

 tional differentiation and integration, 

 /, 161-3 ; organic repair, 1, 173, 177- 

 9 ; adaplability of, 1, 186 ; and in- 

 creased function, 1, 191, 193 ; heart 

 development, 1, 375, 377 ; equilibra- 

 tion, i, 450 ; development of vegetal, 

 S, 256-8, 262-8, 268-71, 381 ; diffe- 

 rentiation of , summary, S, 271-4', 381 ; 

 effect of gravity, ;?, 298; differentia- 

 tion of animal, Z, 3^7-34 ; mamuinlian 

 blood pressure,;?, 329; osseous deve- 

 lopment, Z, 338-42 ; muscularity, S, 

 355 ; muscular colour, 2, 357-60 ; 

 repair and growth, S, 361-4 ; heart- 



motor apparatus, S, 3C6 ; differentia- 

 tion and integration in animal, 2, 368- 

 72, 375 ; iTOod formation, 2, 536-61; 

 resume oi wood formation, S, 5til-6. 



Vegetal (see Botany and Morphology). 



Velocity, of moving bodies, 2, 202-4. 



Veriehrata: size, 1, 111; size at birt>, 

 and maturity, 1. 116 ; axial structure 



1, 136 ; embryonic development and 

 Von Baer's formula, 1, 142-4 ; self- 

 mobility, 1, 147 ; functional differen- 

 tiation, 1, 160 ; reparative power, 1, 

 175, 179 ; homogenesis universal, 1, 

 210 ; Huxley's definition, 1, 307 ; 

 classification of higher, i,308; distri- 

 bution in time, 1, 325 ; classificatoiy 

 value, 1, 361 ; embryonic mammalian 

 respiratory system, 1, 369 ; direct and 

 indirect development, 1, 372, 375 ; 

 evolution and vertebral column, i, 

 382; rudimentary organs, 2, 385 ; evo- 

 lutiou and varied media, 1, 391-7 ; 

 size of head and vertebrae, 1, 424 ; 

 segregation and evolution of vertebrse, 



2, iz7 ; adaptive segmentation, S, 

 104-10, 111 , 208 ; bilateral symmetry, 

 2^ 18n-9; internal orgnnic symmetry, 

 2, 191 ; genesis of rudimentary axis, 

 2, 195-9 ; origin of notochord, 2, 19a- 

 201; spinal segmentation, 2, 202-5, 

 208 ; skull development, 2, 205 ; 

 m.embi'anous, cartilaginous, and osseous 

 skeleton, 2, 207 ; resume, of axis 

 development, 2, 208 ; sensory organs, 

 2, 304; air chambers, 2, 322; osseous 

 difi'creiitiation, 2, 334-46; activity 

 and muscular colour,';?, 356-fiO ; 

 heart-motor apparatus, 2, 366 ; cost 

 of genesis, 2, 416 ; agamogenesis 

 unknown, 2, 426 ; growth and genesi?- 

 2, 433 ; heat expenditure and genesis, 

 2, 446-8, 453 ; Owen, theory of skele- 

 ton, 2, 517-35 ; evolution of vertebroB, 

 2, 532-5 ; origin of type, 2, 567-9. 



Viviparous: homogenesis, 1, 210, 218; 

 heterogenesis, 1, 214-5. 



Volcano, deiinition of life, 1, 67, 70. 



VolvocincB ; indi^'iduality, 2, 202 ; disin- 

 tegration of genesis, 2, 216 ; spherical 

 aggregation, 2, 16 ; symmetry, 2, 122 ; 

 outer tissue, ;?, 234, 379; fertility,.?, 

 421. 



Vomiting, alimentary canal development, 

 2, 315. 



Vorticella: secondary aggregate, ;?, 82 1 

 symmetry, 2, 171. 



