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" ... do butterflies — probably because the causes which determine colour are in their case more complex — yet there are distinct indications of some effect of the kind, and we must devote some little time to their consideration. One of the most curious... "
Tropical Nature, and Other Essays - Page 246
by Alfred Russel Wallace - 1878 - 356 lehte
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Report of the Annual Meeting

British Association for the Advancement of Science - 1877 - 826 lehte
...however, the case is different ; for although they do not exhibit such distinct marks of the influence of locality as do butterflies— probably because...indications of some effect of the kind, and we must devote eome little time to their consideration. One of the most curious cases is that of the parrots of the...
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Harper's New Monthly Magazine, 54. köide

1877 - 974 lehte
...forests." With birds, however, the case is different, and among them locality exerts a marked influence. One of the most curious cases is that of the parrots of the West Indian Islands and Central America, several of which have white heads or foreheads, occurring...
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Annual Record of Science and Industry, 7. köide

Spencer Fullerton Baird - 1878 - 516 lehte
...forests." With birds, however, the case is different, and among them locality exerts a marked influence. One of the most curious cases is that of the parrots of the West Indian Islands and Central America, several of which have white heads or foreheads, occurring...
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Natural Selection and Tropical Nature: Essays on Descriptive and Theoretical ...

Alfred Russel Wallace - 1891 - 518 lehte
...however, the case is different, for although they do not exhibit such distinct marks of the influence of locality as do butterflies — probably because...the most curious cases is that of the parrots of the West Indian islands and Central America, several of which have white heads or foreheads, occurring...
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Natural Selection and Tropical Nature: Essays on Descriptive and Theoretical ...

Alfred Russel Wallace - 1891 - 516 lehte
...although they do not exhibit such distinct marks of the influence of locality as do butterflies—probably because the causes which determine colour are in their...the most curious cases is that of the parrots of the West Indian islands an d Central America, several of which have white iea^g or foreheads, occurring...
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The American Journal of Science and Arts

1876 - 1108 lehte
...because the causes * Papilio Homerus. f P. daumue. J P. OwuUachianus, P. YiHierri. which determine color are in their case more complex — yet there are distinct...the most curious cases is that of the parrots of the West Indian Islands and Central America, several of which have white heads or foreheads, occurring...
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Transactions of the Pharmaceutical Meetings

1877 - 1132 lehte
...ia different ; for although they do not exhibit such distinct marks of the influence of locality ae do butterflies — probably because the causes which...must devote some little time to their consideration. Ona of the most curious cases is that of the parrots of the West-Indian Islands and Central America,...
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