264 MOLLUSCA. 
SHELL small, rather light, elongated, ovate-turreted, dull brown, 
becoming ash-coloured when dry, longitudinally undate-plicate, spi- 
rally encircled with raised threads, with equal interspaces, about seven 
on the penultimate whorl, the depressed portions darker than the 
raised. Spire elongate-conic, this form being continued nearly to the 
base. Whorls six or seven, convex, the last a little more than half the 
length of the shell, ellipsoidal ; constriction around the siphonal canal 
well-impressed ; this groove broad, short, a little reflexed and some- 
what contorted. Aperture small, not more than one-third the length of 
the shell, rounded-ovate ; lip sharp and simple, having a series of about 
ten lamine within, not reaching the edge: pillar strongly arched, 
smooth, slightly invested with an ivory callus, the point projecting as 
far as the lip does anteriorly ; fauces white, the siphonal notch tinted 
salmon-coloured. 
Length four-fifths of an inch; breadth two-fifths of an inch. 
Inhabits Nisqually, Port Discovery, &c., Puget Sound. Pzckering. 
A somewhat rude shell, very variable in its surface, being the 
Pacific analogue of N. ¢rivittata, Say. It is more solid, more undu- 
lated, less shouldered, its pillar lip more protracted, and its aperture 
smaller. It is also closely allied to N. perpinguis, Hinds, from the 
California coast, though differing essentially from his description and 
figure, which represent that shell as much larger, the surface less 
uneven, and the last whorl very much larger proportionally. 
Figures 331, 331 a, two views of the shell, natural size. 
Nassa RuBRICATA (Gould). 
Testa parva, elongata, ovata, granulata, eidermide fulvo liners inter- 
ruptis rufis cincto induta, longitrorsum quindecim costato-phcata, 
plicis ad anfractum ultimum obliquis, versus labrum evanescentibus, 
et striis impressts decussatis ; stria suturah majori, seriem gemmula- 
rum efformante: spira acuto-conica, anfractibus sex convexiusculs : 
apertura dimidiam longitudinis teste haud equans, rotundato-ovata, 
lactea ; labro intus crenulato ; sinu stphonal mediocrt. 
