 | Edward John Burrow - 1818 - 342 Seiten
...terminating in a canal either straight or turned up backwards, and not inclining either to the right or left. The very peculiar form of the aperture in this genus...is destitute of an exserted beak, the same contour is no less observable. The straightness of the rostrum is a much more questionable mark, than the outline... | |
 | Edward John Burrow - 1825 - 334 Seiten
...in a canal either straight or turned up backwards, and not inclining either to the right or left. I The very peculiar form of the aperture in this genus...is destitute of an exserted beak, the same contour is no less observable. The straightness of the rostrum is a much more questionable mark, than the outline... | |
 | John Lee Comstock - 1836 - 396 Seiten
...perfectly oval, and does not gradually contract into a canal, like the Strombi, and Buccina, but suddenly opens into it at the same or nearly the same width, which it retains through the whole length of the beak. The famous Tyrian purple was extracted from an animal... | |
 | John Lee Comstock - 1841 - 398 Seiten
...perfectly oval, and does not gradually contract into a canal, like the Strombi and Buccina, but suddenly opens into it at the same, or nearly the same, width, which it retains through the whole length of the beak. The famous Tyrian purple was extracted from an animal... | |
 | John Lee Comstock - 1847 - 434 Seiten
...perfectly oval, and does not gradually contract into a canal, like the Strombi and Buccina, but suddenly opens into it at the same, or nearly the same width, which it retains through the whole length of the beak. The famous Tyrian purple was extracted from an animal... | |
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The very peculiar form of the aperture in this genus is a strong and never-failing distinctive feature. This is oblong-oval, or perfectly oval, seldom ovate, and does not gradually contract into a canal, but abruptly opens into it at the same or nearly... 