SUBJECT-INDEX. 



365-9; vertebrate skeleton, 8, 520, 

 525, 534. 



Species : adaptation and stability, 1, 

 199; change in, 1, 209; hereditary 

 transmission, 1, 238-41 ; variation in 

 wild aud 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, 465, 473 ; persistence of, 1, 

 428, 430 ; natural selection and equi- 

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



Specific gravity, of organisms and en- 

 vironment, /, 145, 149. 



Sperm cell : unspecialized form, 1, 219- 

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

 267-8, 269-7 J, 280; equilibrium, 1, 

 277. 



Sphere : tendency of units to form, 1, 

 15 ; the embryonic form, 1, 143 ; 

 symmetry, 2, 116. 



Spheroid, symmetry, 2, 117. 



Spine (see Vertebrata). 



Sponge : multicentral development, 1, 

 135 ; reproductive tissue, 1, 222 ; 

 morphological integration, 2, 81-3, 

 111 ; physiological differentiation, 2, 

 283, 379; physiologically unintegmted, 

 2, 375; development and genesis, 2, 

 442; analogy from, 2, 545. 



Spontaneous generation : and hetero- 

 genesis, 1, 210 ; and evolution, 1, 47 k)- 

 84, 485. 



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



Starches: properties, 1, 10-12; saccha- 

 rine transformation, 1, 36, 37 ; 2, 532. 



Steens'rup, J. J. S., on eye of pleuro- 

 nectldce, 2, 188. 



Stickleback: ova, #,433; bothrfocephalus 

 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, .Z, 

 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 ot, 1, 

 ] 17-9, 132 ; relation to environment, 

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



167; functional complexity, 1, 156, 

 167; also diff.-rentiation, 1, 157-60; 

 reparative power, 1, 175 ; social p.nd 

 organic functional interdependence, 1, 

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

 219-22; heredity and function, 1, 

 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 j 

 permanence and complexity, 2, 278, 

 280 ; function and epidermic, 2, 295- 

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

 and repair and growth, 2, 361-4 ; 

 adaptation and equilibration, 2, 385 5 

 persistence of force and physiological 

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

 8. (See also Morphology). 



Struthrrs, Dr. J. : on heredity, 1, 243, 

 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). 



Symmetiy (see Morphology). 



(see Ento-oa). 

 Taste, dependent on chemical action, 2, 



51. 

 Teeth : hereditary transmission, 1, 244 ; 



suppression of mammalian, 1, 370 i of 



uncivilized and civilized, 1, 455. 

 Temperature (see Heat). 

 Tension (see Strain). 

 ThallassicollcB : unicentral development 



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



Ill ; symmetry, 2, 170. 

 Tide (see Sea). 

 Tissue (see Physiology). 

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



natural selection and carapace, 1, 4 IS. 

 Tree (see Botany). 

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

 Trichiniasis, in Germany, 1, 343. 

 Tubicnlce: development, 2, 92 ; bilateral 



symmetry, 2, 180. 

 Turnip: outer tissue, 2, 237; vasculai 



system, g, 264, 268, 547, 5GO, 565. 

 Twins, similarity 0^ 1, 261, 264. 



