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Description

Pecten transenna, n. sp. Plate 52, fig. 3.

 

 

Left valve minute, somewhat oblique, roundly ovate, with straight dorsum and subequal ears, translucent, white, very thin and fragile, moderately convex, with numerous radial riblets and concentric threads. Beak slightly anterior, a little raised, rounded, and smooth.

 

Ears subequal, small, not distinctly marked off from the disc. Anterior end a little shorter, convex, receding below, slightly sinuated below the ear; posterior end straight above and rapidly descending, produced and convex below; the ventral margin broadly convex. Sculpture consisting of numerous fine radiate riblets, with a few secondary shorter riblets, crossed by subequidistant fine concentric lines, the points of intersection with small tubercles. Colour white. Interior white, shining, smooth. Hinge-line straight, with a small triangular resilium beneath the umbo.

 

Diameter—Ant.-post., 3.4 mm.; dorso-ventral, 3 mm.: thickness, 1 mm.

 

Right valve not seen.

 

Type in my collection.

 

Hab.—Near the Snares, in 50 fathoms (type); near the Bounty Islands, in 50 fathoms (Captain Bollons).”

 

 

(Suter, 1913: 881)

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Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© National Museum of Natural History, Smithsonian Institution

Source: Antarctic Invertebrates Website (NMNH)

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