INDEX 



341 



N 



Nachtsheim, 145, 231. 



Nansen, 254. 



Narcissus, 124. 



Nematodes, 206, 231. 



Newell, 237. 



Nicotiana, 96, 143, 144, 192, 193. 



nightshade, 112-116. 



non-disjunction, 53-55. 



notch wing, 77-81. 





 oats, 150. 



Oenothera, 105, 131, 132. 

 0. franciscana, 111. 

 0. gigas, 70, 109, 110. 

 O. Lamarckiana, 69, 71, 109, 110, 



172, 187, 188. 

 0. lata, 172-174, 189. 

 O. semilata, 172, 189. 

 Oguma, 205. 

 Oligarces, 270. 

 Ono, 212. 

 opossum, 205. 

 Osawa, 169. 

 Overeem, van, 131. 



Painter, 203, 204. 



pangenesis, 28. 



Papaver, 171, 197, 198. 



parabiotic twins, 275. 



Parker, 149. 



particulate theory of heredity, 26- 



31. 

 pea comb, 72, 73, 74. 

 pea, edible, 2, 7-10, 36, 37. 

 pea, sweet, 10, 11. 

 Peltogaster, 252. 

 Percival, 151. 

 Perkins, 149. 



Perla, 255-257. 

 Pfliiger, 256, 261. 

 Philippi, 255. 

 Phylloxerans, 228-230. 

 physiological units, 28. 

 Phragmatobia, 105, 211. 

 Pick, 249. 

 pigs, 249. 

 Planaria, 44. 



planarian crossing-over, 43. 

 Plantago, 171. 

 Platanthera, 171. 

 Poinsettia, 177, 181, 182. 

 pollen grains, 10. 

 Ponse, 267, 269. 

 polyploid roses, 158-165. 

 Polyploids, 150-171. 

 poppy, 197, 198. 

 poultry, 207. 

 Prange, 249. 

 Primula sinensis, 112. 

 Pritchard, 276, 277. 

 Protenor, 200. 

 protonema, 126. 

 Punnett, 10, 17, 36. 

 Pygaera, 136, 137, 198, 211. 



R 



rabbit, albino, 74. 

 rabbit, black, 75. 

 rabbits, 285, 290. 

 radium, 139. 

 Rana, 258-265. 

 raspberries, 171. 

 rats, 74, 285-287. 

 recessive characters, 74. 

 recurrent mutations, 66. 

 repulsion, 17. 

 retrograde variety, 69. 

 reverse mutations, 85. 

 Riddle, 272. 



