Description
Author: Jan Delsing
Text ID: 102466
Text Type: 1
Page: 0
Created: 2020-10-23 19:36:54 - User Delsing Jan
Language: EN
Text function: [[t:559387,textblock=102466,elang=EN;Description]]
Specimens (mostly young) differing from the typical form in having about 17 arcuate rounded ribs extending from the constricted suture to the periphery and obsolete on the base; there are also more numerous (about 18) spiral ridges, smaller and of course much closer together than in the case of the typical form. The apex of the largest specimen (about two-thirds grown) is defective, but there are five completed whorls, measuring 78 mm. long and with a diameter of 35 mm. (Dall.)
TYPE in United States National Museum, No. 223031. Type locality,
United States Bureau of Fisheries Station 4224, as Cygnet Inlet, Boca de Quadra, Alaska, in 160 fathoms.
RANGE. Unalaska, Alaska, south and east to British Columbia, in 238 fathoms.
Oldroyd, I.S. The Marine Shells of the West Coast of North America. Volume II.1.