Description
Author: Jan Delsing
Text ID: 123362
Text Type: 1
Page: 0
Created: 2023-05-07 21:09:10 - User Delsing Jan
Language: EN
Text function: [[t:1255814,textblock=123362,elang=EN;Description]]
AS Melanella farica Bartsch, 1915:
Shell small, very irregularly elongate-conic, semitranslucent, bluish white. Postnuclear whorls well rounded, creeping up on the preceding turns and giving the outline at the summit a somewhat excurved aspect, the extreme summit being very feebly shouldered. This, taken together with the fact that the posterior limit of the inside of the whorls shines through the substance of the shell, gives the whorls the appearance of having a spiral cord at the summit. The whorls are very high between the sutures, and are smooth and polished, bearing varices at intervals of slightly more than one-half a turn, thus forming almost two Lines of varices on the two sides of the shell. Sutures strongly marked. Periphery of the last whorl well rounded. Base attenuated. Aperture oval; posterior angle acute; outer lip produced into a claw-like clement in its middle; inner lip almost straight, oblique, reflected over and adnate to the body whorl; parietal wall covered with a thick callus, which renders the peritreme complete.
The type and another specimen, Cat. No. 249711, U.S.N.M., come from Port Alfred (Coll. No. 983). The type has seven whorls, and measures: Length, 3 mm.; diameter, 0.8 mm.
Cat. No. 250379, U.S.N.M., contains another specimen of tins species from the same locality (Coll. No. 1252).
Bartsch, P., 1915. Report on the Turton Collection of South African marine mollusks, with additional notes on other South African shells contained in the United States National Museum.