VIM TABLE OF CONTENTS. 



PAGE 

 ClIUTKK XI. MI.IINII AM) WHITE Hi X(1-I)OVKS CROSSED WITH MoUKNING-DOVKS, COMMON PlOEONS, AND 



THE EUROPEAN TL T HTI.K-IXI\ E 123 



( leneral statement 123 



Blond and white rings crossed with the mourning-dove and its hybrids 123 



Blond and white rings crossed with common pigeons 129 



Archangel X ring 131 



Admista X ring 131 



Fantail X ring 131 



Tumbler X ring 132 



Homer X ring 133 



Blond and white rings crossed with the European turtle-dove and its complex hybrids. . 138 



Sex-ratio in crosses of families, subfamilies, and genera 142 



( 'HAPTEK XII. SEX-LIMITED HEREDITY IN CROSSES INVOLVING BLOND AND WHITE RING-DOVES AND RELATED 



SPECIES 143 



General statement 143 



< 'rosses of blond and white ring-doves 143 



Blond rings and blond-white hybrids crossed with Japanese rings 147 



Blond and white rings crossed with red rings 149 



Crosses involving the Surate turtle-dove, and blond, white, and red ring-doves 155 



CHAPTER XIII. OTHER PIGEON HYBRIDS, AND THE BREEDING OF SEVERAL PURE SPECIES op DOVES AND 



PIGEONS 162 



General statement 162 



Several crosses of doves 162 



Senegalensis X alba 162 



Senegalensis X risoria 163 



Migratorius X risoria and alba-risoria hybrids 165 



Migratorius X alba 165 



Miscellaneous crosses 165 



The sex-ratio and width of cross 166 



Breeding data upon pure-bred pigeons and doves 168 



Spilopelia suralensis 168 



Stigmalopdia scnegalensis 168 



I'haps chakoptera 168 



Streptopelia risoria 170 



Sex and egg of clutch 171 



< 'll APTER XIV. < >N THE NATURE AND BASIS OF HEREDITY .' 177 



1 leredity ; 177 



On Mendelian heredity 180 



Weak germs and irregularities in development 183 



White color 183 



Physical weakness 184 



\\ eakness in common pigeons 185 



Short, abnormal legs 185 



1 list <ii ted development wry neck dolicocephalism 185 



Wry-neck complete lack of co-ordination of head and limbs 186 



Cross-bill 186 



Infertility 186 



lOarly fertility is often followed by later infertility 187 



( 'lIM'TKK XV. DESCRIPTIVE AND HISTORICAL ON THE SYSTEMATIC POSITION OF CERTAIN RlNG-DOVES 189 



The blond ring-dove (Xlrc/>t<i/><li<i rixm-in) 189 



Brisson on the collared turtle-dove 1 90 



Trmmiiick on the blond ring-dove 190 



l.inne mi Colvmba rianria _ 193 



Selhy (in Turttir rixoriiis 19;$ 



The white ring-dove S/rcptn/>clia alba 194 



Temminck's description 194 



Boitard and Corbie's description ];)-> 



The Japanese ring-dove (Sin /ila/ii'liii ilintraca) 107 



lierent descript ions of ring-doves 199 



('lIMTKIt XVI. IMI.I KM KCIF TIIK SPERMATA/OA OF PlCEONS ON R.\TK OF DEVELOPMENT OF K.MIJKYO 201 



I 'll \ITKR XVII. <>N THE Dl VISI 1! I I.ITY OF CHARACTERS 209 



