Strophia media Maynard, 1896

Original Description

            "64 STROPHIA MEDIA Novo.

Medium Strophia.

Plate IV, fig. 3, front, fig. 4, side view of type. DESCRIPTION.

            SP. CH. Size, medium. Shell, thick and heavy. Whirls, 10 the upper of which, including margin, is not quite as long as all of the remaining whirls together. Examined 2 specimens.

            Form of shell, an obtusely pointed cylinder, with the first two whirls equal in diameter, the fourth is but little smaller, then the shell slopes to an obtuse point, forming an angle of about sixty-five degrees. The striations are few, prominent, but more so on the lower whirls than on the upper, eighteen to the first whirl, they are regular not straight, of varying widths, and all excepting on upper whirl are wider on the upper portions than on the lower, but usually a little narrower than the interspaces between them. Some are furrowed, but the ma­jority are smoothly rounded and polished. The whirls are a little bul­ging, and the suture is quite deep.

            Aperture, widely open, but rather contracted deep within. The lower tooth is small, about .03 high, and rather more than twice as long as high; it is about central in position, and is set back not quite twice its length from the frontal bar. The upper tooth is not as high as the lower, but extends back around the column.

            The margin is produced forward about as far as the diameter of the she11, and is slightly inclined to the right, and a little beyond the side of the shell. It is reflexed outward about .10, is a little rolled over, and the edges are sharpened and roughened by breaking. The frontal bar is thin and scarcely developed in the middle, and the stri­ations appear within it as prominences which increase in size far back within the shell.

            Color of shell, externally, yellowish white, marked everywhere with longitudinal, zigzag lines of reddish brown, which are occasionally broken into lines. Internally, pale yellowish brown, becoming white on the margin.


            Size of type, 1.20 by .50. Size of one other specimen examined 1.17 by.50.


This species differs on one hand from S. mumiola by the much larger size and more flanging margin, and on the other from S. mumia by the smaller size, at least .10, than the smallest specimen of the true Mummy Strophia, in the comparatively smaller mouth, less flanging mar­gin, predomination of the white color, with a tendency in the red mark­ngs to assume longitudinal patches, which are rather less brokeninto horizontal lines. The two specimens found in the collection were sim­ply labeled, " Cuba.""

Close Window