Pecten isabellae Macgillivray, 1843
MACGILLYVRAY, W. 1843. A history of molluscous animals of the counties of Aberdeen, Kindardinne and Banff; to which is appended an account of the cirripedal animals of the same district. 372 pp.Cunninghan and Mortime, London. [p. 203, 225]
«4. Pecten Isabellae.— Shell roundish-oval, nearly equivalve, little convex, with twenty-four slender, compressed, rounded ribs, with very numerous thin-edged lamellae, toward the margin rising into triangular spines. Named after Miss Isabella Macgillivray.»
[p. 203, 204] «4, Pécten Isabéllae. Isabella's Scallop.
Shell ovato-rotundate nearly equivalve, little convex, with, twenty-four slender, compressed, rounded ribs, having very numerous elevated thin-edged lamellae, rising toward the margininto triangular, compressed, pointed spines; the grooves with transverse scalar lamellae, not extending over the ridges; the ears very unequal being in length as one to two, divergently sulcate, transversely lamellate, and echimate; the margins of the upper valve under the auricular sinus with four free curved conical spinelets, of which a series is continued to the smooth and glossy umbo; the colour white, the lower valve tinged with pink. Length three-twelfths and a fourth, breadth two-twelfths and three-fourths.
The animal yellowish-white, with the margins of the mantle-lobes marked with carmine dots. Found by me among ascidiae and corallines in a dead valve of Cyprina Islandica, brought from deep water off Aberdeen. This most beautiful Pecten cannot be at all confounded with Pecten varius, or Pecten niveus, to which it is allied in its mode of echination. I have named it after my daughter Isabella, who has greatly aided me in adding to the number of Mollusca of which my catalogue consists.» [p. 225] WILLIAM MACGILLIVRAY, 1843
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