642 



SUBJECT-INDEX. 



tory system, II, 311; osseous dif- 

 ferentiation, II, 351; muscular 

 adaptation, II, 367; persistence of 

 force and physiological adapta- 

 tion, II, 394; vegetal vascular sys- 

 tem, II, 574, 582, 588, 596. 



Hermaphrodism, I, 340-3. 



Hertwig, O.: on Weismann's germ- 

 plasm theory, I, 690; cell charac- 

 ters, I, 691; meaning of fertiliza- 

 tion, II, 613. 



Hertwig, R., classification of tis- 

 sues, I, 189. 



Heterochrony of development, I, 

 655. 



Heterogeneity: in chemical evolu- 

 tion, I, 23-4; of vital changes, I, 

 84-90; of development, I, 170, 178; 

 functional, I, 204-8, 211-2; of or- 

 ganic matter, I, 350-5; organic 

 and instability of homogeneous, I, 

 509-11, 517, 549, 557; segregation 

 accompanying, I, 514-6, 517-8, 

 550. 



Heterogenesis: occurrence, I, 270, 

 272-5, 336; animal nutrition, I, 

 289-91, 295-7; natural selection, I, 

 295-8; heredity, I, 301. 



Hindus: food, I, 68; dwarf family, 



I, 316. 



Histology (see Physiology). 



Hofmeister, sporophytic generation 

 of Archegoniates, II, 80. 



Hollyhock, floral symmetry, II, 167, 

 169, 170. 



Homogeneous, instability of the: 

 variation, I, 330, 334, 342; evolu- 

 tion, I, 509-11, 517, 549, 557; mor- 

 phological development, II, 7-9, 

 234; direction of vegetal growth, 



II, 181; radial symmetry, II, 190; 

 physiological differentiation, II, 

 384, 392. 



Homogenesis (see Gamogenesis). 



Homology, simulation of, by anal- 

 ogy, II, 14. 



Hooker, Sir J. D., I, ix; European 

 plants in New Zealand, I, 477; 

 plant distribution, I, 479; adapta- 

 tion of plants to varied media, I, 

 484; plant growth, II, 56; Balano- 

 phorw and Rafjflesiacew, II, 274; 

 structural complexity, II, 295, 

 297; relative antiquity and dis- 



tribution of plants and animals, 

 II, 297; bean vascular system, II, 

 574. 



Hooker, Sir W., on fructification in 

 Jungermanniacew, II, 52. 



Horns, natural selection and corre- 

 lated variation, I, 537, 567, 674, 

 677. 



Horse: ancestral types, I, 409; fer- 

 tility, I, 598; weight of brain, I, 

 599; quagga markings, I, 624, 627. 



Husbandry, co-ordination of actions 

 in, I, 96, 579. 



Hutchinson, Sir J., hereditary 

 syphilis, I, 623. 



Huxley, T. H., I, ix; " continuous " 

 and " discontinuous " develop- 

 ment, I, 164; classification of de- 

 velopment, I, 276; hermaphrodism, 

 I, 344; zoological classification, I, 

 383; on " Persistent Types," I, 

 408-9; ancestral equine types, ib. ; 

 segmentation of articulates, I, 

 468-9, II, 113; agamic multiplica- 



m tion of Aphis and Entozoa, I, 640- 



' 1; II, 476; cell doctrine, II, 21; ver- 

 tebrate embryo, II, 119, 120; mol- 

 luscan symmetry, II, 202; tegu- 

 mentary organs, II, 314, 315; ver- 

 tebrate sensory organs, II, 318, 

 319; Chotidracanthus, II, 487; 

 Owen's vertebrate theory, II, 563. 



Hyacinth: lateral spike, II, 42; 

 symmetry, II, 141, 162. 



Hybernation, waste and repair in, 

 I, 214-5. 



Hybrids, separation of ancestral 

 traits in, II, 616-7. 



Hydro-carbons: properties, I, 6-9; 

 the term carbo-hydrates (q. v.), I, 

 10. 



Hydrochloric acid, in gastric juice, 

 I, 69. 



Hydrogen: chemical and physical 

 properties, I, 3-5; compounds, I, 

 6, 8, 9, 10-12; 12-13. 



Hydrozoa (see Coelentcrata). 



Hymenoptera (see Insects). 



Hypertrophy (see Disease). 



Hypospadias, telegonic transmis- 

 sion, I, 646. 



Hypostasis of a relation, exempli- 

 fied in explanations of fertiliza- 

 tion, II, 613. 



