INDEX 



197 



Natural selection, 80, 93, 94, 

 95, 99, 100, 106, 107, 117, 140, 

 143, 144, 174, 175, 176. See 

 also Survival of the fittest 

 Nature, 176 

 Negro, 86 



Nervous disorders, 1 1 1 , 112 

 Normal curve, 149 



of frequency of error, 



146 

 frequency curve, 143, 146, 



149, 150 



Nucleolus, 30, 33 

 Nucleus, 5, 29, 34 



segmentation-, 43 

 Nurture, 176 



Oak, 22, 174 

 Ontogenesis, 54, 71, 81 

 Origin of Species, 106 

 Ovary, 21, 87, 89 

 Ovist, 42, 45 



Ovule, 21. See also Ovum 

 Ovum, 22, 28, 29, 33, 37, 47, 78, 

 79, 88, 89, 92, 109, 117, 

 124. See also Egg -cell 

 parthenogenetic, 40 

 Ox-eye daisy, 143 



Pangenesis, 51, 54, 94 

 Panmixia, 100 

 Paramacium caudatum, 18 

 Parthenogenesis, 24, 45 



partial, 24 



seasonal, 24 



total, 25 



Parthenogenetic ovum, 40 

 Pearson, Karl, 143, 150, 154, 162, 

 164, 165, 1 66, 167, 168, 170, 

 171, 175, 176, 180, 181, 182 

 Pigeon, 85, 155 

 Pistil, 21 



Pisum sativum, 1 20 

 Planaria, 9 

 Plant-lice, 24, 25, 90 

 Plants, 96 



Alpine, 99 



flowering, 16 



Plants, sea-, 101 

 Plant-stock, 16 

 Poisons, 104, in 

 Polar body, 37, 38, 40 



nuclei, 88 



Polarity, organic, 52 

 Pollen, 21, 87 

 Polype, 12, 14 



-stock, 12 



Poppy, 151, 153, 166 

 Poulton, E. B., 1 06 

 Poultry, 131 



Predisposition, no, 112, 114 

 Preformation, 47 

 Primrose, 143 

 Probability, 149, 167 



curve of, 147, 148, 149 



law of , 142, 146, 155, 164 



theory of, 146 

 Probable error, 153, 177 



of the normal frequency 



curve, 153 

 Progress, 182, 183 

 Pronucleus, 43 

 Protista, 6, 20 

 Protophyta, 6, 12 

 Protoplasm, 5, 29 

 Protozoa, 6, 12, 16 

 Pull, strength of, 145 

 Punnett, R. C., 124, 128, 139, 

 183 



Quagga, 86 

 Quartile, 152 

 Quetelet, 142 



Rabbit, 136, 137, 138 

 Rational selection, 176, 181 

 Recessive, 121, 123, 124, 126, 



127, 128, 130, 131, 138, 140 

 Regeneration, 7, 8, 50, 51, 54, 63 



physiological, 8 



Regression, 155, 161, 162, 164, 

 170 



coefficient of, 167 



law of, 163, 164 

 Reid, Archdall, 117 

 Relative probable error, 153 



