Cyclopecten culebrensis (E. A. Smith, 1885)
SMITH, E. A. 1885. Report on the Lamellibranchiata collected by H.M.S. Challenger during the years 1873-76. In C. W. Thomson & J. Murray: Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876. Zoology, 13: 1-341, pls. 1-25 [p. 306, pl. 22, figs. 6, 6a]
1885 Pecten culebrensis E. A. Smith, 1885
E. A. Smith, 1885, plate 22.
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«Testa compressa, paulo inaequivalvis, tenuissima, semipellucida, altior quam longa. Valva dextra parum convexa, lamellis numerosis concentricis, plus minusve radiatim squamulatis, ornata. Valva sinistra leviter convexior, liris tenuibus radiautibus et concentricis confertim cancellata, et nodulosa. Auriculae inaequales; antica valvae dextrae superne cristata, radiatim lirata, inferne mediocriter profunde sinuata.
This is a very compressed species, very thin, semitransparent, slightly inequivalve, and higher than long. The right valve is a little flatter than the left, and sculptured with numerous fine concentric lamellae which are more or less ornamented with small scale-like projections disposed in radiating series. When these are broken off the lamellae have a frilled appearance. The left valve has a somewhat coarser sculpture, which consists of slightly stronger concentric lirae and numerous radiating ones, some of which, at irregular intervals, are thicker than the rest, the points of intersection of all, but especially the stronger ones, with the concentric lirse being prettily nodulose. The ears are rather unequal, the anterior as usual being the larger. That of the right valve is rather strongly sculptured with lamellae of growth (produced above into a crest along the hinge-line) and a few somewhat feeble radiating ridges. The umbones are rather acute, having the sides, of which the anterior is rather straighter than the posterior, converging to an apical angle of about 95 degrees.
Length 8½ mm., height 9⅓, diameter 2⅔. Habitat.— Station 24, off Culebra Island, West Indies, in 390 fathoms; Pteropod ooze.» EDGAR ALBERT SMITH, 1885
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