Cerion (Strophiops) mariguanense Clench, 1933

Original Description

"Cerion (Strophiops) mariguanense sp. nov.

(Plate I, figure 3)

            Description.—Shell cylindric, subperforate, smooth to ribbed, solid. Color pale whitish pink to light mottled brownish red (possibly darker in living material). Whorls 11 ½ to 12, last 4 somewhat parallel-sided, remaining whorls forming a smooth conic spire. Sire acute and somewhat attenuated, produced at an angle of 74°. Aperture ovate. Mid-parietal wall with a well developed tooth, columellar lamella present. Lip reflexed and thickened. Sutures fine and slightly indented. Sculpture (holotype) with fairly coarse, irregularly spaced growth lines, and (paratype) fairly strong ribs well developed on the middle whorls, first three whorls smooth, body whorl with the ribs developed in the upper half, the ribs becoming flattened and appearing as growth lines around the base. There are 18 ribs on the body whorl on the one unbroken paratype.

MEASUREMENTS (in millimeters)

Length         Width       Aperture length   Aperture width

41                  14                    10.5                    7                      Holotype

42.5               16                      9.5                    8                      Paratype

            Holotype, Mus. Comp. Zoöl., no. 101,162, and paratype, no. 101,161. South coast of Mariguana, Bahamas, Barbour, Fairchild and Greenway, collectors. (February, 1933.)

            Related to the next two species in general sculptural characters, but differing in color and possessing a rather narrow and produced cylindric form.

            Unfortunately this and the two following species from Mariguana were dead and somewhat bleached when found, and they may all have possessed the reddish color alive. Several had been 'crab shells,' and others were weathered so that all color indications had been lost. The hurricane of the preceding year, which had caused a great deal of damage, had apparently killed the Cerions. A careful search was especially made for members of this genus, and only these dead specimens were encountered. Without question some young individuals, or even adults, probably survived. The island is quite large, and very probably certain areas, more favorably situated, still harbor colonies that were not visited by the collecting party.

            All of the specimens now known from Mariguana belong to the group of Cerion regina, but other groups may possibly be found when the island is more thoroughly explored."

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