Cerion (Strophiops) pepperi Bartsch, 1913

Original Description

"Cerion (Strophiops) Pepperi, new species.

Plate 3, figs. 1, 3, 7-12.

            Shell cylindro-conic, moderately tapering at the apex, chocolate brown, crossed with slender, very retractive, somewhat irregular, whitish, axial riblets, between which appear finer lines of growth. Base rimate, crossed by the continuation of the axial ribs. Aperture small, with a white reflected peristome. Parietal wall provided with a strong fold, which is a little to the right of the middle; the second fold is at the junction of the inner lip and parietal wall.

            This species was found common by Mr. G. W. Pepper, 2 miles south of Mastic Point, Andros Islands, Bahamas. The type, Cat. No. 250217, U. S. N. M., figure 10, has 12 whorls and measures: length 31.0 mm., diameter, 9.0 mm.

            With the type lot are a number of smaller specimens which have a completed aperture, but a much lesser number of whorls, figures 9 and 12. They agree in all characters with the species excepting size and number of whorls. One of these has nine whorls and measures: length, 19.9 mm., diameter, 8.2 mm. Another having nine whorls measures: length, 19.0 mm., diameter 9.5 mm.

            Still another lot of specimens, of which I have seen three, figures 1, 3, and 11, are intermediate in size between these two. These three have a second lip, starting from within the first peristome, building out a new growth and leaving the original reflected peristome as a broad varix. One of these has ten and one eight turns and measures: length 22.9 mm.; diameter 10.0 mm. It would seems as if these smaller specimens indicated a forced maturity owing probably to the effects of a dry season and that with the return of favorable conditions these three have started a new growth.

            Still two other specimens of this species have, probably owing to some injury, assumed a scalariform spire in the later whorls. The two, figures 7 and 8, were collected on a small unnamed key south of Mastic Point, Andros Islands, Bahamas."

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