INDEX 



343 



Skin, tactile discrimination of, 126 



' Sloths,' 247, 252, 257 



Slowness of-process in Natural Selection, 

 137 



Soluble ferments, 36 



Somatic cells, 79, 8g 



Somatogenic characters, 130 



Spectroscope, revelations of, 140 



Speech and inherited powers, 129 



Spermatozoa, 84, 86 



Sperm cell, primary, origin of, 80 



Sperm cells, nature of, 94, 288 



Sphaeroplia, variability of, 290 



Spirogyra, resting-spore, yielding Amoe- 

 bae, 211 



Spontaneous generation, ancient views 

 concerning, 143 ; of crystals, 49 ; said 

 to be a chimera, 147, 158 ; term, in- 

 cludes two processes, 143 ; some of 

 writer's experiments concerning, 147- 



159 

 Spores, absent in Ciliates, 238 

 Spores of Bacilli, resistance of to heat, 



149 

 Sports, 102, 108 

 Staphylococci, 55 

 Stentor, sections of, 41, 83 

 Stones of peach, yielding Nectarines, 



108 

 Streptococci, 55 

 Stylonychiae, encysted, yielding Monads 



and Peranemata, 221-224, 245 

 Stylonychiae from encysted Euglenae, 244 

 Substratum of vital phenomena, 72 

 Sun Animalcules, mode of nutrition of, 



36 

 Survival of germs, 151, 158 

 ' Survival of the fittest,' 103 

 Symmetry in lower organisms, 100 

 Synthesis of ammonium tartrate, 142 

 Synthesis of living matter, 17, 18, 141 ; of 



organic compounds, 66 



Tactile discrimination of skin, 126 

 Tail feathers of Peacock and determi- 

 nants, 121 

 Tall Maize, 105 

 Tardigrades, eggs of, into Ciliates, 251- 



257 

 Temperature, causing variations m Crys- 

 tals, 45 



Theory of Lamarck, 120, 127, 130 



Thermal death-point for Bacteria and 

 Fungus-germs, 151, 132 ; of living 

 matter, 147, 152 



Thorium, 295 



Thought and nerve centres, 14 



Time needed for Evolution, 310 ; dis- 

 cordant views concerning, 310-313 



Tissue elements, death of, 24 ; nutrition 

 of, 35 ; of healthy animals, germless, 

 162 ; exceptions thereto, 162 ; of 

 healthy plants, germless, 162 



Toad-flax, peloria of, io6 



Toe, great, increased size of, 127 



Tongue, setisitivity of, 127 



Torulae, abundant in some infusions, 185 ; 

 development of into Mycoderma or 

 PeniciUum, 58 ; discontinuous growth 

 of, 57 ; evidence in favour of de novo 

 origin, 158 ; in ammonium tartrate 

 solutions, 34 ; varieties of, 56 ; yielded 

 by flask experiments, 153 ; importance 

 of these results, 153 



Transformation of Chlorochytrium cells 

 into Diatoms, 203-208 ; transformation 

 of Chlorochytrium cells into Anabena, 

 208 ; transformation of Chlorophyll 

 corpuscles of Lemna into Anabena, 

 210 ; of Chlorophyll corpuscles of 

 Nitella into Actinophrys, 224-228 ; and 

 into Amoeba, 214-217 ; transformation 

 of contents of Spirogyra resting-spore 

 into Amoebae, 211 ; and of Vaucheria 

 resting-spores into Amoeba, 212 ; eggs 

 of a Gnat-like fly into Ciliates, 258-262 ; 

 eggs of a Rotifer into Ciliates, 263- 

 285 ; eggs of Tardigrades into Ciliates, 

 251-257 ; of encysted Amcebje into 

 Ciliates, 247-251 ; of encysted Eugle- 

 nae into Ciliates, 243-247 ; of encysted 

 Prorodons into Peranemata, 219-221 ; 

 of encysted Stylonychias into Monads 

 and Peranemata, 221-224 ; of Hyda- 

 tina egg into an Otostoma, 264-277 ; 

 of Hydatina egg into a number of 

 Oxytrichae or Vorticellae, 277-285 ; of 

 substance of Euglenae into Amoebae, 

 213 ; and into Peranemata, 217-219 ; 

 of Zoogloea masses into Amoebae, 190 ; 

 into Monads, 189 ; and into Fungus- 

 germs, 187-189 



