Hyalopecten strigillatus (Dall, 1889)
DALL, W. H. 1889. Reports on the results of dredging... “Blake”... XXIX. Report on the Mollusca. Part 2: Gastropoda & Scaphopoda. Addenda & Corrigenda to Part 1, 1886. Bulletin of the Museum of Comparative Zoology at Harvard University, 18: 433-439. [p. 438]
1889 Pseudamusium [sic] strigillatum Dall, 1889
Pseudamusium strigillatum Dall; W. H. Dall, 1889, A preliminary catalog of
the shell-bearing marine mollusks and brachiopods of the southeastern coast of
the United States, plate 42, figure 2.
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«Another small Pseudamusium (strigillatum n. s.), characterized by much elevated crowded concentric lamellae on both valves, inflated and white, has been added to the fauna of the Antilles and Florida Reefs by Dr. Rush and the Albatross party. It is only about 10.0 mm. in height, but P. Tryoni measures over 60 mm. in height, and as much in width, and has much the oblique form of P. phrygium.»
WILLIAM HEALEY DALL, 1889
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«Shell small, white, thiu, rounded, with a straight hinge-margin; left valve inflated, the posterior auricle narrow, separated by a deep narrow byssal notch from the rest of the margin; right valve flatter, the posterior auricle well defined, small; both valves similarly sculptured with nearly equidistant thin lamellae, which, when perfect, curve forward and touch the rising curve of the next succeeding lamella; an absolutely perfect specimen would therefore present a series of equal, smooth, concentric waves, falling almost vertically from the anterior hinge margin and curving in a subcircular sweep around to the depression which marks off the posterior auricle in either valve. Practically, however, the fragile lainelke never retain more than traces of their perfect state and present a series of very sharp elevated concentric laminae following the lines of growth and separated by narrow nearly equal intervals, averaging on the whole four or five to the length of a millimeter, radially measured; the umbones are small and prominent, reaching slightly above the cardinal margin; the interior is smooth and polished; there is no radiating sculpture; the ligament is small and subcentral; there are no transverse rugae on the hinge margin, and no internal liroe. Maximum altitude of the shell 9; maximum latitude 8.5; diameter, 4.4mm.
HAB.— U. S. Fish Commission Station 2383, in 1,181 fathoms, mud, between the delta of the Mississippi and Cedar Keys, Gulf of Mexico; bottom temperature 39°.8 F.; Station 2751, off St. Kitts, in 687 fathoms, ooze; and 2760, 90 miles north of Ceara, Brazil, in 1,019 fathoms, temperatures 39°.9 and 39°.4, respectively. This very simple and yet very characteristic little species seems to stand in need of no comparisons, as it is not sufficiently similar to be easily mistaken for any of the known species.» DALL, W. H. 1890. Scientific results of explorations by the U. S. Fish Commission Steamer Albatross. No. VII.— Preliminary report on the collection of Mollusca and Brachiopoda obtained in 1887-'88. Proceedings of the United States National Museum, 12 (1889): 219-362, pls. 5-14. [p. 250]
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Pecten (Pseudamusium) strigillatum Dall; W. H. Dall, 1890, Scientific results of explorations by the U. S. Fish Commission Steamer Albatross, plate 11, figure 2.
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