954 PROCEEDINGS OF THE NATIONAL MUSEUM. vou. xxxuv. 
the aperture; aperture subovate, acute behind; outer lip simple, 
sharp; anterior margin gently rounding into the arcuate pillar lip, 
which has a single strong plait close to the body; a thin wash of 
transparent enamel on the body; axis imperforate; operculum thin, 
paucispiral, pale yellowish. Height of shell, 6.25; of last whorl, 5.0; 
of aperture, 3.25; maximum diameter, 3.7 mm. 
Type.—Cat. No. 110637, U.S.N.M. San Pedro, California, on 
Lfaliotis, collected by Mr. Ti. N. Lowe. 
This is one of a group of closely related species occurring in 
Southern California; it differs in detail from any of the others, but 
most obviously in its form, which, in miniature, recalls Bulimus 
ovatus Brug. 
Genus li RIGE Owe @O US Bireederivo: 
TRICHOTROPIS ? KELSEYt%I, new species. 
Shell small, whitish, with a velvety pale-olive periostiacum and 
three and a half whorls; spire very short; suture very deep, net 
channeled, but with the whorl in front of it elevated so as to make 
a shallow V-shaped trough; nucleus large for the size of the shell, 
turgid, not distinctly marked off from the rest of the shell; sculpture 
of fine, even, rounded, closely adjacent, spiral threads, a little more 
distant on the base, absent from the trough of the suture, with about 
92 between the suture and the rim of the umbilical funnel; axial 
sculpture only of incremental lines; last whorl much the largest, 
rounded, produced basally, with a deep narrow funicular umbilicus, 
bounded by a rounded ridge corresponding to a siphonal fasciole; 
aperture semilunate, rather narrow, produced and almost channeled 
in front; outer lip thin, arcuate, simple, sharp, not reflected; pillar 
hip thin, straight, sharp, elevated, connected across the body by a thin 
layer of callus with the outer lip; pillar absolutely smooth and 
simple, without any trace of plaits; operculum wanting? Height of 
shell, 6.2; of last whorl, 5.5; of aperture, 3.5; maximum diameter, 
4.0 mm. : 
Type.—Cat. No. 110653, U.S.N.M. U.S. 8. Albatross Station 
2936, off San Diego, California, in 359 fathoms, mud, bottom tem- 
perature 49° F. Also off the entrance to San Diego Harbor, in 80 
fathoms; Prof. F. W. Kelsey. 3 
This curious little shell would have been referred to the genus 
Cancellaria were it not for the total absence of columellar plaits. 
The type-specimen contains what seem to be the dry remains of the 
animal, but there is no indication of an operculum, which possibly 
might have scaled off in dryingy but probably was never present. 
I find the Arctic species of /phinoé have an operculum like other 
