660 



SUBJECT-INDEX. 



multicellular, I, 183-96; Hertwig's 

 classification of tissues, I, 189; 

 continuity of units, I, 190-2; sys- 

 tems of organs, I, 192; division 

 into universal and particular, I, 

 193-4; general truths, I, 194-5; 

 plant and animal, contrasted, I, 

 195-6; precedence of function or, 

 I, 197, 211; correlative complexity 

 of function and, I, 200, 211; pro- 

 gressive concomitant differentia- 

 tion, I, 201-4; physiological units, 



I, 22o-6, 362, 364, 369-71, II, 613; 

 social and organic interdepend- 

 ence, I, 235-42; varied by func- 

 tion, I, 334, 535; II, 217 (see Ac- 

 quired Characters) ; zoological 

 classification, I, 390-2; equilibra- 

 tion, I, 521, 557; progress of, and 

 genesis, I, 590-1; II, 462; coopera- 

 tion with function, II, 3; evolu- 

 tion and increased, II, 4; retro- 

 grade metamorphosis, II, 12; 

 simulated homologies, II, 13-14; 

 earliest organic forms, II, 19; 

 cylindrical vegetal, II, 57-62; per- 

 manence and complexity, II, 295, 

 296; function and epidermic, II, 

 312-4, 387; and muscular, II, 369, 

 391; adaptation and equilibration, 



II, 392; persistence of force and 

 physiological adaptation, II, 394; 

 evolution, II, 501-4. (See also 

 Morphology.) 



Struggle, for nutriment among com- 

 ponents of an organism, I, 562, 

 676; for existence (see Natural 

 Selection). 



Struthers, Sir J.: on heredity, I, 

 305, 314; digital variation, I, 321; 

 rudimentary limbs of whale, I, 

 668. 



Strychnine, effects of, I, 54, 55. 



Sturgeon, size of ova and adult, I, 

 144. 



Sugars: properties, I, 10-11; trans- 

 formations, I, 38, 40, 06, 69, 70, 

 II, 593. 



Suicide, hereditary tendency to, I, 

 307. 



Sulphur: allotropic, I, 4, 59; organic 

 evolution, I, 703. 



Sun (see Light). 



Survival of the Fittest, the expres- 



sion, I, 530, 610. (See Natural 



Selection.) 

 Swan, vertebrae of neck, II, 123. 

 Swiftness, a vital attribute, I, 



578. 

 Syllls ramosa, lateral branching, I, 



166, 361, II, 105, 10S. 

 Symbiosis, II, 399, 400. 

 Symmetry (see Morphology). 

 Syphilis, hereditary transmission, I, 



62b. 



Tactual Perceptiveness, heredity 

 and the distribution of, I, 602-8, 

 633, 665, 666, 672, 692. 



Tcenia (see Eniozoa). 



Tansley, A. G., I, vi, II, vi; adapta- 

 tion of reproductive activity to 

 conditions in Algw, I, 288-9; 

 shapes of Caulcrpa, II, 22; stem- 

 thickening in extinct Thallo- 

 phytes, II, 56; natural selection 

 and leaf-distribution, II, 179. 



Tape-worm (see E-ntozoa). 



Taste, dependent on chemical ac- 

 tion, I, 54. 



Teeth: hereditary transmission, I, 

 306; suppression of mammalian, I, 

 457; of uncivilized and civilized, I, 

 541, 693. 



Tegumentary organs, origin of, I, 

 314-6. 



Telegony, or the influence of a pre- 

 vious sire on offspring, I, 624-7, 

 644-6, 649-50. 



Temperature (see Heat). 



Tension (see Strain). 



Termites: fertility, I, 583, II, 493; 

 late development of sexual or- 

 gans, I, 680; nutrition and differ- 

 entiation of forms, I, 681. 



Tetramorium, utilization of aphides 

 by, I, 660-1. 



Thallophyta: size, I, 138, 139; low 

 co-ordination of parts, I, 164; 

 pseudo-foliar, II, 28; "transition 

 place," II, 30; simulation of 

 higher types, II, 32; secondary 

 thickening in extinct species, II, 

 56; sexual and asexual genesis, II, 

 84. (See also Algce.) 



Tickling, physiology of, I, 76. 



Tide (see Sea). 



Time, as a factor in growth, II, 77. 



