The Variation of Animals and Plants under Domestication · Charles Darwin
CITRONS, 10 (2).
_Columba guinea,_ 6. _Columba gymnocyclus,_ Gray, a form of _C. livia,_ 6. _Columba gymnophthalmos,_ hybrids of, with _C. œnas,_ 6; —with _C. maculosa,_ 6. _Columba intermedia,_ Strickland, a variety of _C. livia,_ 6. _Columba leucocephala,_ 18. _Columba leuconota,_ 6 (2). _Columba littoralis,_ 6. _Columba livia,_ 13 (2); —the parent of domestic breeds of pigeons, 6; —measurements of, 5; —figured, 5; —skull figured, 5; —lower jaw figured, 5; —scapula figured, 5. _Columba luctuosa,_ 6. _Columba migratoria_ and _leucocephala,_ diminished fertility of, in captivity, 18. _Columba œnas,_ 6; —crossed with common pigeon and _C. gymnophthalmos,_ 6. _Columba palumbus,_ 6, 26. _Columba rupestris,_ 6 (3). _Columba schimperi,_ 6. _Columba torquatrix,_ 26. _Columba turricola,_ 6. COLUMBIA, cattle of, 6. COLUMBINE, double, 10, 25. COLUMBUS, on West Indian dogs, 1. COLUMELLA, on Italian shepherd dogs, 1; —on domestic fowls, 7 (2), 20, 28; —on the keeping of ducks, 8; —on the selection of seed-corn, 9; —on the benefits of change of soil to plants, 18; —on the value of native breeds, 24.
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