Pecten tenuicostatus Mighels & Adams, 1842
MIGHELS, J. W. & C. B. ADAMS. 1842. Descriptions of twenty-four new species of New England shells. Boston Journal of Natural History, 4: 37-54, pl. 4. [p. 41, pl. 4, fig. 7]
«PECTEN TENUICOSTATUS.
Plate IV. Fig. 7. P. testa parva, tenui, sub-inequivalvi; valva superiore plerumque rubro-fusca, tenuicostata, costis majoribus 25 usque ad 30, totidem minoribus; auribus costulatis; valva inferiore pallide rubro-fusca; extus et intus laevi.
Shell small, sub-orbicular, higher than long, thin, equilateral, sub-equivalve, upper valve a little more convex; with twentyfive to thirty slender ribs and smaller ones intermediate; for the most part reddish-brown; inferior valve smooth, paler than the upper; ears slightly unequal, those of the upper valve delicately ribbed, of the other smooth; color internally the same as externally; inner surface of the lower valve smooth, that of the upper grooved. Length, ,5 inch; height, ,56 inch; width, ,14 inch. Cabinets of Mons. Largillier, J. W. Mighels, and G. B. Adams. Habitat. Casco Bay, taken from stomachs of haddock in the summer of 1840. We have found but four specimens. REMARKS. This is unquestionably a very rare species. It does not appear to be very nearly allied to any of the other species found on our coast. Further research will be necessary to determine whether or not the specimens already found are mature. Like most of the Pectens, this shell varies very much in coloring.» JESSE WEDGWOOD MIGHELS & CHARKES BAKER ADAMS, 1842
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J. W. Mighels & C. B. Adams, 1842, plate 4.
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