TABLE OF CONTENTS. 



PAGE 



Editorial Statement iii 



Chapter I. Introductory 3 



Chapter II. CROfiSEs and Fertility of Wild Species of Pigeons 9 



Lists of species crossed and bred 9 



Statement by the editor 11 



List of infertile individual niatings 13 



Classification of Columbae 14 



Chapter III. Fertility and the Sexes 15 



Chapter IV. Japanese Turtle-doves Crossed with a Distantly Related and with a Closely Related 



Species 23 



Common pigeon X Japanese turtle-dove 23 



Fertility tests of hybrids of common pigeon X Japanese turtle-dove 25 



Japanese turtles crossed with European turtle-doves 26 



Turtur liybrids crossed i7iU'r se and with parent species 26 



Fertility and longevity in pure-bred Japanese turtle-doves 29 



Chapter V. Mutation, Fertility, and Longevity in Inbred Japanese Turtle-doves 41 



Japanese turtle "mutants" of 1909 and 1910 41 



The breeding of "mutant" No. 108 42 



Autopsies of Turtur orientalis lOS and 433, and of their young hatched in 1912 45 



Inbreeding, fertility, and longevity in the offspring of Japanese turtle-doves of pairs 4 and 5 47 



Brother and sister matings 47 



Crosses with Streiilupilia 4S 



Condensed fertility record of non-inbred offspring of male orientalis (2) X female 



orierilalis (2) 49 



Inbreeding of uncle to niece and origin of an interesting family of inbreds 50 



Chapter VI. Effect of Season of Hatching Upon Distribution of Fertility Among the Offspring 



OF AN Overworked Pair of Japanese Turtle-doves 56 



General statement 56 



The fertility of the females of the series 59 



The fertility of the males of the series 60 



Condensed and consecutive record of matings made to test fertility of offspring of this 



family 62 



Summary 63 



Chapter VII. Crosses of Japanese Turtle-doves with Blond and White Ring-doves 68 



Sex-limited inheritance of color in blond and white ring-doves crossed with Japanese 



turtle-doves 69 



Reciprocal crosses of alba and orientalis 69 



Reciprocal crosses of risoria and orientalis 69 



Color and sex in F2 ring- Japanese hybrids 70 



Reciprocal crosses of St. alba and T. orientalis 71 



Orientalis male X alba female 71 



Alba male X orientalis female 72 



Reciprocal crosses of risoria and orientalis 74 



Primary hybrids crossed inter se and with parent species 74 



Further breeding of complex orientalis-alba-risoria hybrids 74 



Chapter VIII. Guinea-pigeons Crossed with Common Pigeons 88 



General statement 88 



Matings and back-crosses of guinea hybrids 91 



Chapter IX. Breeding and Inbreeding for Color in Some Domestic Pigeons 95 



General statement 95 



Color and weakness in homers 95 



Black, red, and gray barbs from black parents 99 



Physical degeneracy and red and white color associated with late season and with 



inbreeding in gray Briinn pouters 100 



Color in owl X rock crosses 102 



Fertility and season in crosses of common pigeons with feral Columboe 102 



Preceding data on wild rock pigeons 103 



Chapter X. Zenaidura and Its Crosses with Zenaid.* and Hybrids 114 



