Index of Subjects 



391 



Polyzoa 275 



Poppies 39, 200, 241 



"Porcupine men" 219 



Porokeratosis 220 



Practical hints 231, 291 



Pre-Mendelian writings 5 



Presence and absence, hypothesis of 54, 



65, 76 



bearing on pathology 23-2 

 Prickliness 21 

 PRIMULA 4 o 



colour in F 2 72, 294 



colour in F% from two whites 105 



crossing 294 



dominant and recessive whites 105 



double 31, 199 



heterostylism 27, 68, 295 



"lavender," 299 



palm-leaf and fern-leaf 24 



special phenomena of colour in 138 



stellate and imbricate petals 26, 

 236 



white- edged flowers 138 

 Pseudo-hypertrophic muscular paralysis 

 222, 225 



PtOSis 222 



Pncdnia glumarum 25, 233 

 "Pure lines" of Johannsen 239 

 Purity of type 



critical meaning of 17, 291 

 how produced by Selection 129 

 of germ-cells 146 



RABBIT 



Angora hair 33 



Belgian hare 119 



colour 41 



a dominant pied form 86 



Dutch-marked 84, 85, 142, 237 



"English" pattern 86, 239 



Himalayan in, 123 



interrelations of colours 75 



lop-eared 251 



sex statistics 193 



tortoiseshell 117 



yellow 116 

 Ranunculus arvensis, fruits 21 



,, ficaria 311 



RATS 



colours 41 



"ghost "-markings in albino 145 



hooded 85 



Irish colour 85 



no yellow known 116 

 Ratios in F 2 



9:3:4 explained 77, 80; 12:3:1, 78; 



9:7, 89 ; 18 : 18 : 6 : 6 : 16, 40 ; 



27 :9 : 28, 91 



aberrant 252 



various 79 

 Recessive characters 8, 324 



recognition of 232 



in man 225 



Reciprocal crosses giving different results 



167, 174, 186, 203 

 Re-combination 



novelties through 60 



source of new breeds 71 

 Red Indians 209 



Repetition of Parts and Heredity 275 

 Retinitis pigmentosa 225 

 REVERSION 



nature of 99, 278 



fowls 103 



mice 99, in 



orchids 96 



pigeons 100 



stocks 95 



sweet peas 89 



Right- and Left-handedness 48 

 Rogueing crops 292 

 Round seed 28 

 Rust disease 25, 233 



Salix 249, 367 



Salvia 4 1 



Sap-colour 98 



Saturation of colours 80, 143 



Seasonal forms 257 



Seed shape peas 14 



character 1 5 



maize 30 



Seed skin, Pisum, colour of 14 

 Segregation 7, 10, n, 13 



absence of 246, 256, 355 



consequences of 15, 338 



nature of 268 



time of 269 



somatic 273 



and species 283 

 Selection 240 



natural 288 

 Selective mating between gametes 119, 



161, 195 



Serrated leaf, Urtica, Phyteuma 22 

 SEX 



determination of 164 



and chromosomes 188 



and horns in sheep 169 



and Spurious Allelomorphism 174 



and double flowers 197 



and wings 170 



summary of evidence 190 



of Bryonia 166 



Lychnis 169 



of rabbits 192 

 Sex-limited descent 169, 221, 222 



in deaf-mutism 229 



in tylosis 219 



dominants 231 

 Sheep 



colour 42 



horns 169 

 Shirley poppy 241 

 Silene inflata 19 

 Silk, colours 137 



