392 



INDEX. 



Oppel's classification, 2S. 



Order of deposits with elevation, 74; 

 with sinking land, 74; of for- 

 mations, 16, 17; of original for- 

 mation, 76; of stratification, 73; 

 of superposition, 24, 77. 



Ordinal characters, evolution of, 266. 



Ordo of Linne, 201. 



Organic cell and atom of matter, 

 166; and inorganic element, 166; 

 the morphological unit, 164; con- 

 ditions of evolution, 119; growth 

 (development), 89; individual, 

 160, 162; primitive form of, 165; 

 and inorganic action, 175; process, 

 evolution an, 96. 



Organism, an aggregate of cells, 

 164; definition of, 163; and en- 

 vironment, 130; Huxley's defini- 

 tion, 163; incessantly changing, 

 164; individuality of, 166; intrinsic 

 marks of, 175; Kant's definition, 

 174; Man an, i; old and new view, 

 4; purposeful development of, 97; 

 related genetically to ancestor, 129. 



Organisms affected by environment, 

 130; and environment, 6; as en- 

 vironment, 113; express evolu- 

 tion, 89; time-scale for study of 

 history of, 54; scope of history of, 

 I. 



Organs, 97; and taxonomic rank, 

 225. 



Origin of form, not of matter, 1S4; 

 and initiation, 70; of provinces, 

 123. 



Origin of species, 1S3; by evolution, 

 126; illustrated, 188; meaning of, 

 185; unsettled problems of, 197 



Origins, unknown cause of, 127. 



Osborne, H. F., evolution of mam- 

 mals, 323, 363. 



Ovum, segmentation of, 171. 



Palaeo-biology, 68. 

 Paleontologist and marine organ- 

 ism, 116; method of, 5; work of, 



4- 



Paleontology, foundation of, 20; 

 species in, 207. 



Paleozoic time, 22, 23, 26. 



Paleozoic brachiopods, 254. 



Palisade revolution, 42. 



Pangenes, 166. 



Paradoxides fauna, 52. 



Paris basin rocks, 21. 



Permanency of characters, 193, 299; 

 following plasticity, 297; and limi- 

 tation in breeding and distribu- 

 tion, 299. 



Permanent characters, rank of, 300. 



Permian system, 71. 



Periods of climax in evolution, 255; 

 and formations, 66; of time and 

 fossils, 83. 



Periods in geology, 25, 69; defini- 

 tion of, 30; divisions of eras, 52; 

 and groups, 24; relative lengths 

 of, 54- 



Perpetuation of characters, 259. 



Phenacodtis printcEvus , 362. 



Phillips, John, classification, 23. 



Philosophy of evolution, 371; a 

 summary, 380. 



Phylephebic, 95. 



Phylogenesis, 166; of Haeckel, 95; 

 and change of function, 95; a con- 

 tinuous series, 95; in classifica- 

 tion, 237; and ontogenesis con- 

 trasted, 95. 



Phylogenetic evolution of races, 

 220; theory, 295. 



Phylogeny, or Phylogenesis, 180; of 

 race, 294. 



Physical conditions of evolution, 

 119. 



Physical time estimates, 56. 



Physiological function, 178; signifi- 

 cance of origin of species, 193. 



Physiology and the organism, 163. 



Pictet's rules about fossils, 82. 



Plankton, 116. 



Planorbis zone, 68. 



Plastic characters at early stage, 

 301. 



Plasticity of characters, 193, 289. 



Pliocene, 21. 



Point of view in discussing evolu- 

 tion, 371. 



Polarity, 222. 



Polymeric type, in classification, 



235- 



Post-pliocene, 21, 24. 



Predetermined features of develop- 

 ment, 180. 



Prefix w^r/)/^^, in morphephebic, 94; 

 ///!'/, in phylephebic, 95. 



Prestwich, length of glacial and 

 post-glacial time, 63. 



Primary in geology, 14; Fossilifer- 

 ous Period, 24. 



Primitiv Gebirge, 13, 16, 19. 



Primitive formation, 12, 13, 19; tis- 

 sues of development, 172. 



Production of differences in repro- 

 duction, 129. 



Progenitors, number of, Darwin, 



195- 

 Progress of life, 25. 

 Progressive change, 3; evolution in 



mammals, 323. 

 Protoplasm, 166, 169. 



