 To give one instance out of several which I have observed : — I crossed some white fantails, which breed very true, with some black barbs — and it so happens that blue varieties of barbs are so rare that I never heard of an instance in England ; and...  Queensland agricultural journal Volume 5 - 18 ページ1899 - 608 ページ全文表示 - この書籍について
 | Charles Darwin - 1873 - 492 ページ
...barbs—and it so happens that I blue varieties of barbs are so rare that I never heard of an instanco in England ; and the mongrels were black, brown, and...barb with a spot, which is a white bird with a red ^ «, fl/^ '.:.i- - 1 CHAP. I. Domestic Pigeons. V) tail and red spot on the forehead, and which notoriously... | |
 | Charles Darwin - 1875 - 504 ページ
...fantails, which breed very true, with some black barbs — and it so happens that blue varieties of barbs are so rare that I never heard of an instance...crossed a barb with a spot, which is a white bird with a rod tail and roil spot on the forehead, ai.d which notoriously breeds very true ; the mongrels were... | |
 | Charles Darwin - 1882 - 492 ページ
...fantails, which breed very true, with some black barbs — and it so happens that blue varieties of barbs are so rare that I never heard of an instance...crossed a barb with a spot, which is a white bird with 't red tail and red spot on the forehead, ai.il which notoriously breeds very true ; the mongrels were... | |
 | Charles Darwin - 1883 - 494 ページ
...fan tails, which breed very true, with some black barbs — and it so happens that blue varieties of barbs are so rare that I never heard of an instance...; and the mongrels were black, brown, and mottled. 1 also crossed a barb with a spot, which is a white bird with a rod tail and red spot on the forehead,... | |
 | Charles Darwin - 1884 - 494 ページ
...so happens that blue varieties of barbs are so rare that I never heard of an instance in KngUir.d ; and the mongrels were black, brown, and mottled. I...crossed a barb with a spot, which is a white bird with a rod tail and red spot on the forehead, and which notoriously breeds very true ; the mongrels were dusky... | |
 | Alfred Russel Wallace - 1889 - 520 ページ
...crossed some white fantails with some black barbs, and the mongrels were black, brown, or mottled. He also crossed a barb with a spot, which is a white....with a red tail and red spot on the forehead, and the mongrel offspring were dusky and mottled. On now crossing these two sets of mongrels with each... | |
 | 1893 - 1266 ページ
...fantails, which breed very true, with some black barbs — and it so happens that blue varieties of barbs are so rare that I never heard of an instance...crossed a barb with a spot, which is a white bird with red tail and red spot on the forehead, and which notoriously breeds very true ; the mongrels were dusky... | |
 | Alfred Russel Wallace - 1901 - 542 ページ
...crossed some white fantails with some black barbs, and the mongrels were black, brown, or mottled. He also crossed a barb with a spot, which is a white...with a red tail and red spot on the forehead, and the mongrel offspring were dusky and mottled. On now crossing these two sets of mongrels with each... | |
 | James W. Barclay - 1903 - 228 ページ
...fantails, which bred very true, with some black barbs, — and it so happens that blue varieties of barbs are so rare that I never heard of an instance...also crossed a barb with a spot, which is a white barb with a red tail and a red spot on the forehead, and which notoriously breeds very true : the mongrels... | |
 | Alfred Russel Wallace - 1889 - 523 ページ
...crossed some white fantails with some black barbs, and the mongrels were black, brown, or mottled. He also crossed a barb with a spot, which is a white...with a red tail and red spot on the forehead, and the mongrel offspring were dusky and mottled. On now crossing these two sets of mongrels with each... | |
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