336 



INDEX 



Death-point, thermal, tor Bacteria and 



Fungus-germs, 151 ; of living matter, 



147 

 Definitions of life, 22 

 De novo origin of contagious diseases, 



315-331 ; of crystals, 47, 49 

 Denucleated eggs, fertilisation of, 84, 87 

 Descent of man, 308, 309 

 Desmids, fixity of habitat, absent, 306 

 Determinants, 75 ; active and passive 



states of, 78 ; composed of biophors, 



78 ; distribution of, 78 ; double sexual, 



79 ; in ids, 76 ; in tail feathers of pea- 

 cock, 121 ; mode of action of, 78 ; 

 sorting of, 95 ; unequal nutrition of, 

 115 ; vital affinities of, 79 



Development of brain in human type, 

 309 ; of Torulae, 58 



Development fer saltum, 104, no ; uni- 

 sexual, 87 



Dialysis, 65 ; favouring crystallisation, 44 



Diatomaceae, ancient and modern types 

 similar, 305 ; similar forms of in varied 

 regions, 305 ; variability of, 305 



Diatoms, heterogenetic origin of, 199- 

 207, 299 ; in ivy-leaf Duckweed, 207, 

 208 ; have no motile spores, 203 



Digestion by enzymes, 36 ; followed by 

 assimilation, 33 ; in Amoebae, 37 ; in 

 Actinophrys, 36 ; in Ciliated Infusoria, 

 37 ; of Otostoma, rapid, 37 



Diglenffi flourish in dark pots, 280 



Dimorphism of crystals, 44 ; seasonal, 



"3 



Diphtheria and scarlet fever, 330 



Diplogenesis, 132 



Discontinuous growth, 38, 291 ; of 

 Torulae, 57 



Discontinuous heating of infusions, 147 ; 

 variation, 104, 108 



Discrete corpuscles, development of 

 into Monads, 193 ; into Amoebae, 194 ; 

 into Fungus-germs, 196 ; mode of 

 appearance of, 193 ; production of in 

 pellicle, 192, 239 ; structure of, no 

 nucleus, 196 



Disuse and use, inherited effects of, 75 



Doctrine of heredity, 73, 95 ; of evolu- 

 tion, and present lowest forms of life, 



97 

 Duckweed, algoid parasite of, 199 ; ap- 



pearance of infected leaves, 200 ; asso- 

 ciation of with young Diatoms, 201 ; 

 epidermal cells of contain Algae and 

 Diatoms, 202 ; interpretation of pre- 

 sence of Diatoms, 203-208 ; mode of 

 infection by Algae, 200 



Duckweed, ivy-leaf, also contain Chloro- 

 chytrium and Diatoms, 207 ; Anabena 

 in cells of, 208 



Duration of encystment of Ciliates, 284 



Earth, age of, 310 ; discordant views 



concerning, 310-313 

 Effects of use and disuse, 119 

 Egg and water mixture, pellicle on, 195 

 Egg, denucleated, fertilisation of, 84, 87 

 Egg of Hydatina into an Otostoma, 264- 



277 ; into many Vorticellae or Oxy- 



trichae, 277-285 

 Eggs of a Gnat-like fly into Ciliated In- 

 fusoria, 258-262 ; of a Rotifer into 



Ciliated Infusoria, 263-285 ; of Tardi- 



grades into Ciliated Infusoria, 251-257 

 Electrical theory of matter, 294 

 Electrons in atoms of hydrogen and 



mercury, 294 ; intermediate between 



matter and ether, 295 

 Elementary vital units, 29 

 Elk, Irish, horns of, 125 

 Embryonal areas, 182 

 Encysted Euglenas into Ciliates, 243-247 

 Encystment of Ciliates, duration of, 284 

 Energy, persistence of, 59 ; chromatin 



as source of, 83 

 Entity, Life not an, 31 

 Enzymes and assimilation, 36 ; digestion 



by, 36 ; varieties of, 70 

 Ephemeridae, 259 

 Ephemeromorphic plexus, 291 

 Ephemeromorphs, 289, 290 

 Epidermal cells of Duckweed contain 



Algae and Diatoms, 202 ; explanation 



of, 206 

 Euglenae, encysted, into Ciliates, 243- 



247 ; into Amoebae, 213 ; into Perane- 



mata, 217-219 

 Evening Primrose, 108 

 Evidence for heterogenesis, congruity 



of, 298-314 

 Evolution, cell a product of, 29 ; doctrine 



of, 73 ; doctrine of and present lowest 



