270 



INDEX 



Ovists, 22. 

 Oyster-borer snail, 47. 



Pacing habit, 129. 



Palatine ridges, 149. 



Pangenesis, 85, 114. 



Papaver, 63. 



Parallel induction, 93. 



Paramecium, 48, 110. 



Parthenogenesis, 26, 107, 210. 



Partial potency, 180. 



Particulate inheritance, 121, 164. 



Pasteur, 6. 



Pattern factor, 163, 171. 



Patterson, 202. 



Pearson, 42, 43, 49. 



Peas, garden, 124, 132, 134, 177. 



sweet, 13, 160. 

 Petunias, double, 63. 

 Pflijger, 200. 

 Phacechcerus, 91. 

 Phaseolus, 102. 

 Phenotype, 113, 148. 

 Phyrrhocoris, 207. 

 Plesiosaurs, 71. 

 Pigeons, 148, 201. 

 Pigment factor, 161. 

 Pigs, birth-rate of, 201. 

 Polar cells, 23, 211. 

 Polydactylism, 238. 

 Pomace fly (see Drosophila). 

 Poppy, Shirley, 63. 

 Population, 115. 

 Porcupine, 150. 

 Potency, defined, 179. 



failure of, 180. 



partial, 180. 



total, 179. 

 Poultry, birth-rate of, 201. 



booted, 182. 



tailless, 68, 129, 181. 



and the factor hypothesis, 173. 



and Sudan Red III, 83. 



and white color, 179. 

 Predisposition to disease, 93. 

 Prenatal influences, 87. 

 Presence and absence hypothesis, 



132. 

 Preventable death, 258. 

 Price, 129. 



Primitive man, 224. 

 Primroses, double, 63. 



Lamarck's evening, 64. 

 Prophase, 18. 

 Protophyta, 7. 

 Protoplasm, 15. 

 Protozoa, 7, 10. 

 Proximity, influence of, 241. 

 Pug jaws, 69. 

 PUNNETT, 127, 216. 

 Pure line, 103. 

 Puritan stock, 239. 

 Purple beech, 63. 



Quadruple hybrids, 143. 

 Quail, 92. 



Rabbits, albino, 59. 



birth-rate of, 201. 



color in, 13, 169. 



ears of, 183, 193. 



gray, 171. 



lop, 183. 

 Radiolaria, 17. 

 Rats, albino, 59. 



inbred, 241. 

 Raynor, 217, 218. 

 Recessive, 126, 148, 157. 



extracted, 148. 

 Redfield, 79. 

 Red flowers, 129. 

 Regeneration, 210. 

 Regression, 98, 151. 

 Regressive varieties, 72. 

 Reid, 78. 

 Reinfection, 94. 

 Relative variability, 47. 

 Repair, 7. 



Reproduction, sexual, 9, 20. 

 Resting cell, 18. 

 Restriction factor, 166, 170. 

 Reversed dominance, 178. 

 Reversion, 146. 



false, 149. 

 Riddle, 83. 

 RiMPAU, 153. 

 Ritzema-Bos, 241. 

 Roan color of cattle, 176. 

 Rock-pigeon, 148. 

 Roses, double, 63. 



