Pecten pustulosus Verrill, 1873
VERRILL, A. E. 1873. Brief contributions to zoölogy, from the Museum of Yale College. No XXIII.– Results of recent dredging expeditions on the coast of New England. American Journal of Science and Arts [Third Series], 5: 1-16. [p. 14]
«Pecten pustulosus V., sp. nov.
Upper valve more convex than the lower, a little swollen toward the umbo; length and breath nearly equal, the margin diverging nearly at right angles from the beak to the middle of the anterior an posterior borders, on each of which there is an obtuse angle, from which the outline of the ventral margin forms a regular curve, nearly semicircular, but a little produced ventrally; the surface with about 14 radiating rows of relatively large, prominent round, hollow vesicles, those in the middle rows nearly hemispherical, while part of those of the lateral ones are subconical and smaller; seven or eight of the rows are first developed, ar a short distance from the apex of the shell, the other ones afterward coming in between the primary ones; the rows are distant in the middle and more crowded together toward the borders; between the rows of vesicles the surface is marked by distant, fine, impressed grooves, which pass between and separate the vesicles; on the umbos, above the origin of the vesicles, the border of the grooves rises into a thin, slightly elevated lamella. Lower valve with fine, close, slightly raised, concentric lamellae, becoming faint toward the beak. Auricles unequal, that of the upper valve small, and little projecting posteriorly, much larger and more prominent, with a deep, curved emargination anteriorly, its surface with concentric lamellae and radiating rows of small conical vesicles; that of the lower valve with a deep, angular byssal notch anteriorly, its surface with concentric lamellae and faint radiating ridges. Color yellowish-white. Length ·30 of an inch; height ·32; thickness ·10.
Near St. George's Bank (s), in 150 fathoms, mud (living); east of St. George's (g) in 430 fathoms, sand and gravel (dead, but fresh valves).» ADDISON EMERY VERRILL, 1873
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