Description
Author: Jan Delsing
Text ID: 93985
Text Type: 1
Page: 0
Created: 2019-05-27 21:03:21 - User Delsing Jan
Language: EN
Text function: [[t:605575,textblock=93985,elang=EN;Description]]
Shell small, white, with a translucent thin periostracum and about five whorls (the nucleus eroded); spire slightly longer than the aperture; early whorls rounded with about fifteen slender, low, arcuate, protective, axial riblets which are obsolete on the last whorl; suture distinct, marginate, where the riblets are conspicuous as at the periphery and continued to the suture in front; there are also fine, well-marked lines of growth, all crossed by close-set, low, spiral threads which become coarser and slightly more distinct on the canal; anal sulcus deep, wide, rounded, the outer lip in front of it strongly protective, thin, simple; body and pillar with a thin wash of callus; the pillar straight, attenuated in front, aperture narrow and lunate, canal short, rather wide, not recurved. Lon. of shell, 11.25 mm; of last whorl, 8.5 mm, of aperture, 6.5 mm ; max. diam. 5.0 mm.
Dall, W.H., 1908. Reports on the dredging operations off the west coast of Central America to the Galapagos, to the west coast of Mexico, and in the Gulf of California in charge of Alexander Agassiz, carried on by the U. S. Fish Commission Steamer “Albatross”, during 1891. XIV