Strophia palida Maynard, 1889

Original Description

"STROPHIA PALLIDA Novo.

Pallid Strophia.

Plate II, 14 & 14A, shell.

DESCRIPTION.

            Size, medium. Shell, thin. Striations, present. The whirls are 11.

The teeth are two, and very short. Examined 25 spec­imens.

            Form, a pointed cylinder, the first whirl measuring most in diame­ter and each of the next four is less in size, then the remainder taper to a short point, forming an angle of about 60 degrees. The stria­tions are not numerous, 14 on the first whirl, rather regular, but not arranged III lines; they are slightly inclined from right to left, and the interspaces are one third wider than the prominences. The striations are not furrowed and the edges are rounded.

            Aperture, very large and open and the walls within it are so thin

that the striations can be seen through them. Lower tooth, not prom­inent, .03 high by .08 long, and its position is a little to the right of the centre; the upper is placed high and is not prominent

            Margin, not produced forward beyond the diameter of the shell, is

straight, very thin, with the edges slightly rolled backward. The front­al bar is moderately well developed and the elevated striations appear within it.

            Color of shell, externally, flesh color, deepening to pale purple on the two upper whirls; margin, striations, and apex, white; internally, pale purplish.

DIMENSIONS.

            Size of types, 1.03 by .36 and 1.03 by .33. Largest specimen, 1.07 by .40; smallest, .85 by .33. Greatest diameter, .41; smallest, .32. Longest specimen, 1.07; shortest, .85.

OBSERVATIONS.

            There is a slight inclination to assume a cylindrical form but the

pointed specimens are the most common.

            Known by the coarse striations, thin shell, pointed form, and pale

ground colors, with the white striations and margin.

DISTRIBUTION AND HABITS.

            The Pallid Strophias occur on the island of Inagua in the cultiva­ted fields that lie on the slopes of the hills that border the southern shores, between fifteen and twenty miles from Mathewstown, and pos­sibly elsewhere on the island."

Close Window