51)6 



SUBJECT-INDEX. 



SG5-9 ; vertebrate siieleton, S. 520, 

 525, 531. 



Species : adaptation and stabilitv, 1, 

 199 ; cliange in, 1, 209 ; hereditary 

 transmission, 1, 2nS-41 ; variation in 

 wild and cultivated, 1, 260-2, 2G2-4 ; 

 gamogenesis, 1, 281-6; indefinite 

 valne, 1, 305, 381 ; special creation, 1, 

 337-40 ; instability of homogeneous 

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

 429-31, 465, 473 ; persistence of, 1, 

 428, 430 ; natm'al selection and equi- 

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



Specific gravity, of organisms and en- 

 vironment, i, 145, 14^. 



Sperm cell : nnspeeialized form, 1, 219- 

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

 267-8,269-70, 280; equilibrium, 1, 

 277. 



Sphere : tendency of units to form, 1, 

 15 ; the embrs onic form, i, 149 ; 

 symmetry, 2, 116. 



Spheroid, symmetry, 2, 117. 



Spine {see Vertehrata). 



Sponge : multicentral development, 1, 

 135 ; reproductive tissue, 1, 222 ; 

 morphological integration, 2, 81-3, 

 111 ; physiological diJfi^rentiation, 2, 

 283. 379; physiologically unintegrated, 

 2, 375; development and genesis, 2, 

 442; analogy from, 2, 545. 



Spontaneous geaeration : and hetero- 

 genesis, i, 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, 532. 



Steenstrup, J. J. S., on eye of pLeiiro- 

 nectida, 2, 188. 



Stickleback: ova, ^,433; lothriocephalus 

 in, 2, 486. 



Stoaiach {ftee Alimentary canal). 



Stomata, distribution, 2, 243. 



Striiojlit line, and evolution hypothesis, 

 1, 348. 



Sti-ain : 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 ; growl h and complexity Oi, 1, 

 117-9, 133; relation to environment, 

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



167 ; functional complexity, 1, 156, 

 167; also differentiation, 1, 157-60; 

 reparative power, 1, 175 ; social r.nd 

 organic functional interdependence, 1, 

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

 219-22 ; lieredity and function, 1, 

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

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

 classification,!, 305-8; equilibration, 



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

 function, 2, 3 ; evolution and in- 

 creased, 2, 4; earliest organic forms, 



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

 permanence and comniexity, 2, 278, 

 280 ; function and epidermic, S, 295- 

 9, 380 ; and muscular, 2, 360, 384 1 

 and repair and gi-owth, 2, 361-4; 

 adaptation and equilibration, 2. 3S5 ; 

 persistence of force and plivsio'ogical 

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

 8. {See also Morphology). 



Struthers, 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, i, 4, 56 ; oiganic 

 evolution, 1, 436. 



Sun {see Light). 



Survival of the fittest {see Natural se- 

 lection). 



Symmetry {see Morpliolcgy). 



T^NIA {see Eiitozon). 



Taste, depeiiaent on chemical action, i, 



51. 

 Teeth: hereditary transmission, i, 244 ; 



suppression of mammalian, 1, 3/0; oi 



uncivilized and civilized, 1, 455. 

 Temperature {see Heat). 

 Tension {see Strain). 

 ThallassicoUcB : unicentral development 



i, 134 ; secondary aggregate, 2, 80-3. 



Ill ; symmetry, 2, 170. 

 Tide {see Sea). 

 Tissue {see Physiologv). 

 Tortoise: life of dog and, 1, 84, S5 



natural selection and carapace, 1, 4 18. 

 Tree {see Botany). 

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

 Trichimasis, in Germany, 1, 313. 

 Tubicolce: development, ^, 92 ; bilateral 



symmetry, 2, 180. 

 Turnip: outer tissue, 2, 237; vasculai 



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

 Twins, similarity oI", 1, 261, 264. 



