INDEX OF SUBJECTS 



399 



Penguin, wings of, 287 



Pentacrinus, 119 



Perception, 208, 212, 253; an act 

 of, 208; of personality, not per- 

 sonality, 212; sensory, 253 



Percepts, objective, 235; senory, 

 219 



Periodicity, 56; of elements, 56; 

 families of elements, 56 



Peri Psyches, Aristotle's, 196, 197, 

 215 



Perissodactyla, 78 



Permian, 104, 118 



Persistence, 116, 119, 123; cannot 

 be subsumed under same princi- 

 ples as transmutations, 123; its 

 significance intensified by cur- 

 rent theories, 123; of types, 119; 

 of unchanged types, 116 



Persistent types, generic and spe- 

 cific, 123 



Personal identity, sense of, 212 



Personality, 205, 211, 212, 238; a 

 unitary and uniform reality, 

 212; alternating, 211; based on 

 unchanging principle, 212; per- 

 ception of, 212 



Pessimism, 355, 357 



Petit-Puymoyen, industry of, 331 



Phaeophytin, 147 



Pharyngeal arches and clefts, 278, 

 279 



Phase, reversal of, 168, 169 



Phenomena, 208, 209; phenome- 

 nalists' substantialization of, 209 



Phenomenalism, 207, 208, 211, 212; 

 a purely academic philosophy, 

 211; identifies mind with 

 "thought stream," 212 



Phenomenalistic school, 206 



Phenomenalists, 203, 205, 206, 207; 

 inconsistently admit of physical 

 phenomena while denying sub- 

 ject of psychic phenomena, 206, 

 207 



Phenotype, 5, 19, 25, 27, 41, 43, 68, 

 123 



Philology, 339; proves primitive 

 man to have been civilized, not 

 barbaric, 339 



Philosophers, 220 



Philosophy, 189, 190, 195; in role 

 of critic, 189; in role of syco- 



phant, 190; materialistic, 195; 



relation to science, 189 

 Phonetic elements, 246 

 Photosynthesis, 146 

 Phycocyanin, 149 

 Phylogeny, 39, 80, 122, 275, 276, 



284, 285, 308; human, 285, 308; 



palaeontological, 115 

 Phylum, 37, 38, 69, 116 

 Physical impressions, 213 

 Physical science, 352, 354 

 Physicochemical action, reducible 



to interaction between unequally 



energized masses and particles, 



175 

 Physicochemical forces, executive 



factors in vital operations, 201 

 Physiology, 350 

 Phytol, 147 

 Picotee sweet pea, 19 

 Piltdown skull, 320 

 Pineal eye, 292 

 Pineal gland, 292, 293, 295; not 



functionless, 293 

 Pioneer colonies, 110 

 Pithecanthropus, distinctly simian, 



342 

 Pithecanthropus erectus, 309, 313- 



318, 342; cranial capacity of, 



314; a giant ape, 315; existing 



casts inaccurate, 318 

 Pituitary body, 292, 293 

 Pituitrin, 294 

 Placenta, 276 

 Planarian, 278 



Planetesimal, hypothesis, 181 

 Plantigrade, 272 

 Plastids, 139, 141 

 Platycrinidse, 92 

 Platyrhine monkeys, 287 

 Pleistocene, 78, 100, 104, 313, 319, 



320, 325; Lower, 313, 320; Mid- 

 dle, 319 

 Pleurotomaria, 118 

 Plica, semilunaris, 297 

 Pliocene, 78, 95, 309, 313, 317, 323; 



Upper, 309, 313, 317 

 Pluteus, 159 



Polar body, second, 159 

 Polariscope, 144 

 Polymorphism, 122 

 Polynesians, 325 

 Polynuclear condition, 138 



