GASTEROPODA. 255 
appears corrugated throughout. In old specimens, the callus rises 
into an elevated marginal wall, with oblique folds and a canal at the 
angle posteriorly ; interior of the aperture with sharp, raised revolving 
lines. 
Length an inch and a quarter; breadth four-fifths of an inch. 
Obtained at Puget Sound, at the mouth of the Columbia River, and 
at San Diego, California. 
Its thin structure, ventricose form, the very oblique folds on the 
upper part of the large whorl, and the remarkable channel around the 
base of the siphonal notch, are its chief characters. It belongs to the 
same group as UN. trivittata, Say. On some specimens a fine thread 
intervenes between the broader rings. 
Figures 321, 321 a, dorsal and ventral view of the shell. 
BuccinuM FaRinosuM (Gould). 
Testa parva, solida, rhomboidea, lutescens rufo cincta, spiraliter granu- 
lato-filosa, longitudinahter undato-plicata, plicis ad octo acutis demum 
numerosis et prope labrum acutum in varicem terminantibus : spira 
brevis, conica, anfractibus sex convexis, ultimo acuminato, reflexo: 
apertura angusta, lunata; labro intus sex-plicata ; columella rugoso- 
granulosa, callosa ; fauce alba. 
Suett small, short, rhomboid-ovate, longitudinally undate-plicate ; 
folds about eight, rather distant and compressed, sharp on the upper 
whorls, becoming delicate and numerous on the last whorl, where 
there is a large abrupt varix at some distance from the lip, and gra- 
dually sloping towards it. ‘Transversely the shell is surrounded with 
regularly spaced, elevated threads, about five on the upper whorls, the 
whole dotted by lines of growth. Colour yellowish, with indistinct, 
dusky bands, formed by the interspaces of the revolving lines being 
coloured when they pass the folds, and quite distinct on the varix ; 
spire short-conic. Whorls six, convex, the last one two-thirds the 
length of the shell, sloping forwards about equally with the spire, and 
forming a somewhat elongated, flexed beak. Aperture very narrow- 
