INDEX 



341 



discrete corpuscles in pellicle, 192 ; 

 from Zooglcea masses in pellicle, 187- 

 192 



Origin, heterogenetic, of Peraneraata 

 from substance of encysted Euglenae, 

 217 ; from substance of encysted 

 Prorodons, 219 



Origin, heterogenetic, of Peranemata 

 and Monads from encysted Stylony- 

 chiae, 221-224 



Origin of Otostoma from egg of Hyda- 

 tina, 264-277 ; and of Oxytrichae or 

 Vorticellae from egg of Hydatina, 277- 

 28s 



Otostoma, found in dead body of Hyda- 

 tina, 275 ; found free-living, 276 ; and 

 encysting within thick cyst, 276 



Otostoma, hyaline cyst of, 267, 284 ; 

 from egg of Hydatina, 264-277; in 

 Nitella, rapid digestion of, 37 



Oxygen, allotropic states of, 67 ; influ- 

 ence of on movements of lower organ- 

 isms, 31 



Oxytrichae or Vorticellas from Hydatina 

 eggs, 277-285 



Oxytrichae, Vorticellae, and Aspidiscae, 

 their probable genetic relations, 281, 

 283 



Ova of Amphioxus and of Sea-urchin, 

 experiments with, 77 



PaL/EONtological record, interpreta- 

 tion of, 302 



Pancreatin, 70 



Pangenes, 75 



Pangenesis, 75 



Parasite, algoid, of Duckweed, 199 



Parasites, degeneration in, 124 



Parasitic habit, inheritance of, 123 



Parasol Ants, 125 



Parmelia, 248, 252 



Parsimony, law of, 54 



Parsley, modification of, 133 



Parthenogenesis and nuclear changes, 

 86 ; artificial excitation of, 86 ; a com- 

 mon phenomenon, 85 



Particles, ultra-microscopic, growing into 

 Bacteria, 52 



Pathogenic and common microorgan- 

 isms, 316 



Pathogenic Bacteria, origin of, 324, 330 



Peacock's tail feathers and determinants, 

 121 



Peacock, varieties of, 104 



Peach-trees, producing Nectarines, 107 ; 

 stones of yielding Nectarines, 108 



Pellicle, Bacteria in, 184 ; on egg and 

 water mixture, Amoebae in, 195 ; pro- 

 duction of Ciliates in, 230-243 ; of dis- 

 crete corpuscles in, 239 ; of small 

 masses of Zooglcea, 182-198 ; villi of, 

 origin of Ciliates in, 236 



Peloria, regular and irregular, 106 



Pelorism, 135 



Penicillium from Torula, 58 



People of Punjaub, joints of, 127 



Pepsin, 70 



Peptones, 65 



Peranemata from encysted Prorodons, 

 219-221 ; from Euglenae, 217-219 ; 

 and Monads from encysted Stylony- 

 chias, 221-224 



Peripatus, how ancient a form, 313 



Persaltum development, 104, no 



Persistence of energy, 59 



Persistent types of life, meaning of, 303- 

 307 



Phylogenetic lines, not continuous, 307 



Physical and Vital Forces, Correlation of, 



9,59 



Physical basis of life, 59, 71 



Physiological correlations, 119 ; units, 

 75,92,94.99. id. "4, 121,289 



Plants, adaptive changes in, 133 ; and 

 animals, their relations, 14, 15, 17 ; 

 formation of albuminates in, 17 ; 

 healthy tissues of, germless, 162 ; life 

 of, 25 ; immutable states of, 112 ; 

 infection of, by Bacteria, 163 ; by 

 Mould, 163 ; mutable states of, 112 ; 

 nutrition of, IS ; pabulum of, 15 ; plas- 

 ticity of, 134 ; products of, 16 ; regene- 

 ration in, 89 



Plasticity of plants, 134 



Plastide, 28 



Plastidules, 75, 93 



Pleomorphic organisms, 289 



Pleurococcus, variability of, 289 



Polar bodies, 86 



Polarity, 91, 96 ; organic, 92, 99, loi, 113, 

 291 ; as cause of simple living forms, 

 98 ; as cause of symmetry, 100 



