 | American Academy of Arts and Sciences - 1882 - 584 páginas
...pigmentary matter, and in this manner would arise a kind of primary or fundamental pattern, namely, a pale ground with darker linear markings, following the course of the veins (Pieris cratcegl). This pattern occurs in most of the families. Let it be supposed that at a given... | |
 | 1868 - 676 páginas
...pigmentary matter, and that in this manner would arise a kind of primary or fundamental pattern, namely, a pale ground with darker linear markings following the course of the veins, eg Pieris cratiegi. For the present we shall notice only the upper surface of the wings, in which the... | |
 | James Samuelson, William Crookes - 1868 - 664 páginas
...pigmentary matter, and that in this manner would arise a kind of primary or fundamental pattern, namely, a pale ground with darker linear markings following the course of the veins, eg Pieris craiaegi. For the present we shall notice only the upper surface of the wings, in which the... | |
 | 1882 - 588 páginas
...pigmentary matter, and in this manner would arise a kind of primary or fundamental pattern, namely, a pale ground with darker linear markings, following the course of the veins (Pieris cratcegi). This pattern occurs in most of the families. Let it be supposed that at a given... | |
 | Boston Society of Natural History - 1897 - 502 páginas
...matter, and that in this manner would arise a kind of primary or fundamental color-pattern, namely, a pale ground with darker linear markings following the course of the veins, eg Pieris crataegi." lie also attempted to explain the formation of eye-spots by assuming that crescent-shaped... | |
 | American Academy of Arts and Sciences - 1882 - 544 páginas
...pigmentary matter, and in this manner would arise a kind of primary or fundamental pattern, namely, a pale ground with darker linear markings, following the course of the veins (Pieris crataegi). This pattern occurs in most of the families. Let it be supposed that at a given... | |
 | 1882 - 614 páginas
...pigmentary matter, and in this manner would arise a kind of primary or fundamental pattern, namely, a pale ground with darker linear markings, following the course of the veins (Pieris cratcegi). This pattern occurs in most of the families. Let it be supposed that at a given... | |
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At first the scales growing on the membrane upon or near the veins show a freer development of pigmentary matter, and in this manner would arise a kind of primary or fundamental pattern, namely, a pale ground with darker linear markings, following the... 