INDEX 



197 



Nisus formativus 34 

 Non-disjunction 139-142 

 Notch wing 104-106 

 Nucleus 91 



Origin of Species 35, 145 

 Orthogenesis 34 



Paleontology 24-27 

 Papilio polytes 63 

 Papilio turnus 63 

 Paramecium 181, 182 

 Paratettix 81 

 Peach eye color 114 

 Pea comb 55 

 Pearl 161 

 Peas 47 



Pigeons 172, 174, 175 

 Pink eye color 114, 115 

 Planarian 22 

 Plymouth Rock 76 

 Po'darke 22 

 Polar bodies 126 

 Pole arms 5 

 Protozoa 181 



Pseudo-parthenogenesis 183 

 Purple eye color 109 

 Purpose 4 



Rabbits 83, 170 

 Rats 176-180 

 Reduction division 182 

 Reproductive cells 96 

 Ruby eye color 106 

 Rudimentary organ 116 

 Rudimentary wing 70, 71, 107 



Sable body color 107 

 Science, definition of, 6 

 Segregation 41 

 Selenka 94 



Sepia eye color 13, 114 

 Sex chromosomes 118 

 Sex linked inheritance 75, 



118-130 

 Sexual dimorphism 62 



Sheep 33 



Single comb 55 



Sooty body color 50, 114, 115 



Speck 68, 69, 111 



Spencer 146 



Spermatozoon 91, 98 



Stars, evolution of, 6 



St. Hiliare 27-30 



Strap wing 110, 111 



Stumpy wing 11 



Sturtevant 75, 143 



Stylonychia 183 



Survival of the fittest 146 



Systematist 85 



Tails 33 



Tan flies 106, 107 

 Tetrabelodon 191 

 Trefoil 111 



Truncate wing 111, 112, 167, 

 168 



Unfolding principle 34 

 Unio 22 



Unit character 72, 73 

 Use 31 



Variation, discontinuous 13 

 Vermilion eye color 108, 163 

 Vestigial wing 11, 55, 56, 109, 



133 

 Vital force 34 



Wallace 36 



Walnut comb 55 



W T eismann 17, 31-33 



Wilson, E. B. 125 



Wingless 67 



Winiwarter 126 



White eye color 13, 75, 119-130 



Whiting eye color 163, 164 



Woodruff 183 



Yellow body color 108, 127-129 

 Yolk sac 16, 17 



Zeleny 169 



