SUBJECT-INDEX. 



365-9 ; vertebrate skeleton, 2, 520, 

 525, 534. 



Species : adaptation and stability, 1, 

 199 ; change in, 1, 209 ; hereditary 

 transmission, 1, 238-41 ; variation in 

 wild and cultivated, 1, 260-2, 262-4 ; 

 gamogenesis, 1, 284-6 ; indefinite 

 value, 1, 335, 361; special creation, 1, 

 337-40; instability of homogeneous 

 and heterogeneity of, 1, 421-3, 428, 

 429-31, 46% 473 ; persistence of, 1, 

 428, 430 ; natural selection and equi 

 libration, 1, 457-62, 469, 474. 



Specific gravity, of organisms and en 

 vironment, 1, 145, 149. 



Sperm cell : unspecialized form, 1, 219- 

 24, 253 ; dissimilarity of, 1, 265-7, 

 2G7-8, 2G9-7J, 280; equilibrium, 1, 

 277. 



Sphere : tendency of units to form, 1, 

 15 ; the embr&amp;gt; onic form, 1, 143 j 

 symmetry, 2, 116. 



Spheroid, symmetry, 2, 117. 



Spine (see Vertebraia), 



Sponge : multicentral development, 1, 

 135 ; reproductive tissue, 1, 222 ; 

 morphological integration. 2, 81-3, 

 111 ; pbysiological differentiation, 2, 

 283. 379; physiologically unintegrated, 

 2, 375; development and genesis, 2, 

 442; analogy from, 2, 545. 



Spontaneous generation: and hetero- 

 genesis, 1, 210; and evolution, 1, 479- 

 84, 485. 



Stamens, and foliar homology, 2, 33-6. 



Starches: properties, 1, 10-12; saccha 

 rine transformation, 1, 36, 37 ; 2, 5J2. 



Steens irup, J. J. 8., on eye of pleura- 

 nei-tidce, 2, 188. 



Stickleback: ova, 2,433; bothriocephalus 

 in, 2, 466. 



Stomach (see Alimentary canal). 



Stomata, distribution, 2, 243. 



Straight line, and evolution hypothesis, 

 1, 348. 



Strain : compression and tension of, 2, 

 192-5 ; vegetal structure, 2, 543-57, 

 561-5; origin of vertebrate type,!?, 569. 



Strawberry : multiaxial development, 1, 

 137 ; multiplication, 2, 421. 



Structure : biology and organic, 1, 94-6, 

 96-8 ; functional co-ordinate modifi 

 cation, 1, 100-3 ; size and organic, 1, 

 110-12 ; growth and complexity ol, 1, 

 117-9, 132; relation to environment, 

 1, 145-50; precedes function^ 1, 153, 



167 ; functional complexity, /, 156, 

 167; also differentiation, 1, 157-60; 

 reparative power, 1, 175 ; social and 

 organic functional interdependence, 1, 

 192-6, 197-9 ; reproductive tissue, 1 % 

 219-22; heredity and function, l t 

 244-52, 255-6 ; varied by function, 

 1, 270-2, 455-7, 2, 200; zoological 

 classification, 1, 305-8; equilibration, 



1, 432-5, 474 ; co-operation with 

 function, 2, 3 ; evolution and in 

 creased, 2, 4 ; earliest organic forms, 



2, 12 ; cylindrical vegetal, 2, 54-8 ; 

 permanence and complexity, 2, 278, 

 280 ; function and epidermic, 2, 295- 

 9, 380 ; and muscular, 2, 360, 384 j 

 and repair and growth, 2, 361-4 ; 

 adaptation and equilibration, 2, 385 5 

 persistence of force and physiological 

 adaptation, #, 387 ; evolution, 2, 474- 

 8. (See also Morphology). 



Strut hers, Dr. J. : on heredity, 1, 213, 

 252 ; digital variation, 1, 258-60. 



Sugars: properties, 1, 10-12; vegetal 

 transformation, 1, 36, 37 ; 2, 562. 



Sulphur: allotropic, 1, 4, 56; organic 

 evolution, 1, 486. 



Sun (see Light). 



Survival of the fittest (see Natural se 

 lection). 



Symmetry (sec Morphology). 



TS:NIA (see Enfasm). 



Taste, dependent on chemical action, 2, 



51. 

 Teeth : hereditary transmission, 1, 244 ; 



suppression of mammalian, 1, 370; oi 



uncivilized and civilized, 1, 455. 

 Temperature (see Heat). 

 Tension (see Strain). 

 Thallassicolla : unicentral development 



1, 134 ; secondary aggregate, 2, 80-3, 



111 ; symmetry, 2, 170. 

 Tide (see Sea). 

 Tissue (see Physiology). 

 Tortoise: HTe of dog and, 1, 84, 85 



natural selection and carapace, 1, 4 18. 

 Tree (see Botany). 

 Tremblay, A., on the polype, 1, 180. 

 Ti ichiniasis, in Germany, 1, 343. 

 Tubicolce: development, 2, 92 ; bilateral 



symmetry, 2, 180. 

 Turnip : outer tissue, , 237 ; vasculai 



system, 0, 264, 268, 547, 560, 565. 

 Twins, similarity ol ; , 1, 261, 264. 



