 | Charles Darwin - 1861 - 470 Seiten
...Practically, when a naturalist can unite two forms together by others having intermediate characters, he treats the one as a variety of the other, ranking the most common, bnt sometimes the one first described, as the species, and the other as the variety. But cases of great... | |
 | Charles Darwin - 1864 - 472 Seiten
...Practically, when a naturalist can unite two forms together by others having intermediate characters, he treats the one as a variety of the other, ranking...difficulty, which I will not here enumerate, sometimes occur in deciding whether or not to rank one form as a variety of another, even when they are closely... | |
 | Charles Darwin - 1875 - 504 Seiten
...retained their characters for a long time ; for as long, as far as we know, as have good and true species. Practically, when a naturalist can unite by means...great difficulty, which I will not here enumerate, nometimes arise in deciding whether or not to rank ono form as a variety of another, even when they... | |
 | Charles Darwin - 1882 - 494 Seiten
...retained their characters for a long time ; for as long, as far as we know, as have good and true species. Practically, when a naturalist can unite by means of intermediate links any two forms, ho treats the one as a variety of the other ; ranking the most common, but sometimes the one first... | |
 | Charles Darwin - 1883 - 494 Seiten
...retained their characters for a long time ; for as long, as far as we know, as have good and true species. Practically, when a naturalist can unite by means...sometimes the one first described, as the species, and the ether as the variety. But cases of great difficulty, which I will not here enumerate, sometimes arise... | |
 | Edward Clodd - 1888 - 326 Seiten
...almost equally difficult to define ; but practically, when a naturalist can unite by means of close intermediate links any two forms, he treats the one...as the ' species,' and the other as the ' variety.' l i . No two individuals of tlie same species are exactly alike ; each tends to vary. Of this obvious... | |
 | Linnean Society of New South Wales - 1902 - 938 Seiten
...the amount of difference in the forms which he is continually studying." Then again he states : — " Practically when a naturalist can unite by means of...other as the variety. But cases of great difficulty sometimes arise in deciding whether or not to rank one form as a variety of another, even when they... | |
 | Charles Darwin - 1902 - 770 Seiten
...retained their characters for a long time; for «s long, as far as we know, as have good and true species. Practically, when a naturalist can unite by means...intermediate links any two forms, he treats the one as > variety of the other; ranking the most common, but •ometimes the one first described, as the species,... | |
 | American Museum of Natural History - 1915 - 732 Seiten
...varieties ' in such a protean group, I have endeavored to act in harmony with Mr. Darwin's directions: 'When a naturalist can unite by means of intermediate...forms, he treats the one as a variety of the other. ' It must be remembered that many of these ' varieties ' apparently breed true and prevail in certain... | |
 | Joel Asaph Allen - 1901 - 686 Seiten
...varieties ' in such a protean group, I have endeavored to act in harmony with Mr. Darwin's directions : ' When a naturalist can unite by means of intermediate...forms, he treats the one as a variety of the other. ' It must be remembered that many of these ' varieties ' apparently breed true and prevail in certain... | |
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Practically, when a naturalist can unite two forms together by others having intermediate characters, he treats the one as a variety of the other, ranking the most common, but sometimes the one first described, as the species, and the other as the variety. 
