No. 1052, Mollusca, Survey Cabinet.
DAPHNELLA, Hinds.
D. clathrata, G.
D. t. parva, fusiformis, tenuis; anfr. III nucleosis, lævibus; anfr. normalibus III+ supra oblique truncatis; superficie confertim clathrata; striis radiantibus obsoletis circa basim; apertura magna; columella parum tortuosa; labio parum incrassato; labro acuto; sinu postico sub-profundo, supra acuto, ad suturam attingente; colore albido, sparsim brunueo punctato.
Long. ·37, lat. ·14, long. aper. ·22.
Shell small, fusiform, thin, aperture longer than the spire; nuclear whorls three, smooth; normal whorls three or more, obliquely truncated above, convex below, this truncation is partially obsolete on the last whorl; surface closely clathrate, except on the lower part of the last whorl where the radiating lines become obsolete; aperture large, columella somewhat twisted, slightly encrusted; outer lip thin, acute, posterior sinus moderately deep and narrow, adjoining the suture and angular at its upper corner; color, brownish white with minute brown spots sparsely scattered, usually placed on the larger of the revolving ribs.
Hab. Santa Catalina Island, 60 fms. Dr. Cooper.
This little shell looks not unlike the young of Pleurotoma Carpenteriana, supra, but on a critical comparison, shows several characters incompatible with such a reference; the strongest of these is the peculiar shape of the posterior sinus. In addition to this, the whorls of the present species are much more numerous in proportion to the size, the first six whorls of P. Carpenteriana making a shell three or four times the diameter of this one.
No. 1053, Mollusca, Survey Cabinet.