254 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Type in United States National Museum, No. 130426. Type locality, 
Station 3452 in 125 fathoms, Straits of Juan de Fuca. 
Range. Straits of Juan de Fuca and Oregon coast. 
Buccinum sericatum Hancock, 1846 
Antmls and Magazine of Natural History, 18:328; PI. 4, fig. 7. 
Shell ovate, ventricose, very thin, of a pale-chestnut color, irregularly 
varied with paler longitudinal belts; spire not much produced; whorls 
six, ventricose, somewhat abruptly rounded behind, with fine spiral striae, 
and a few distant stronger ones crossed by minute lines of growth, 
giving the surface a wrinkled or shagreen appearance, visible only by 
the aid of a lens; body-whorl one-third longer than the spire; mouth 
roundish ovate, one-half longer than the spire; outer lip thin, sublobed in 
front; interior of a pale-chestnut or fawn color; columella smooth, 
pellucid, short, much and regularly arched, the bend more forward than 
usual; epidermis of a greenish horn-color with a delicate silky gloss 
when held to the light, caused by the minute cilia that clothe it, which 
through a lens are perceived to rise from fine longitudinal laminae; the 
cilia are regular and not much crowded. Length, 1; breadth, 11/16 in. 
(Hancock.) 
Type in? Type locality, west coast of Davis's Strait. 
Range. Arctic Ocean; circumboreal. 
Buccinum physematum Dali, 1919 
Plate 12, fig. 5 
Proceedings of the United States National Museum, 56 :328. 
Female shell rather large, thin, inflated, acute, whitish, whorls rapidly 
enlarging, about six and a half in number, the nucleus decorticated, the 
suture deep, not channeled; spiral sculpture of very numerous somewhat 
irregular, fine threads, mostly with narrower interspaces and with little 
or no tendency to fasciculation, an angle at the margin of the base; 
penultimate whorl with about sixteen, narrow, retractively arcuate ribs, 
extending from suture to suture with wider interspaces but obsolete on 
the last whorl; aperture wide, cream-colored, the outer lip thin, arcuate, 
reflected, the body erased, the pillar short, slightly twisted, with a wide, 
very short canal and moderate fasciole. Height of shell, 60; of last 
whorl, 47; diameter, 40 mm. (Dali.) 
Type in United States National Museum, No. 122555. Type locality, 
United States Fish Commission Station 3253, in Bering Sea. 
Range. Bernard Harbor, Arctic coast, to Point Barrow and Bristol 
Bay, Alaska. 
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