CLASS GASTROPODA 
185 
ad longitudinem nodoso-costalis, costis magna haud regularibus sub- 
obliquis; apertura longa, paene lunata; columella subrecta callosa; faucibus 
rufescentibus. Cochlea insignis sinistrosa cassa et ponderosa, 84 mm. 
longa. et 50 mm. lata est; anfractibus eius ultimus paene % testae occupat 
(si mensuram a tergo feceris), ita ut apertura perlonga appareat. An- 
fractus convexi sulcis latis costisque elevatis transversis instructi sunt; 
in ultimo costae circa viginti numerantur. Apex obtusus papillae haud 
dissimilis laevis est et spadiceus, anfractus cetri ad longitudinem nodoso- 
plicati sunt. Color testae sordide caeruleoque albidus et rufescens, praeser- 
tim iis quoque in locis, ubi corium detritum est. Striae incrementi aper- 
turam versis tantummodo expressimae sunt. (Morch.) 
Sinistral shell, ovate, dully bluish-white and rufescent on the obtuse 
apex; five whorls divided by a deep suture, transversely sulcate, nodose- 
costate longitudinally, with regular suboblique costae; aperture long, some¬ 
what turrate; columella nearly straight callus; inside rufescent. A re¬ 
markable shell, sinistral, thick and ponderous, its last whorl occupies a 
part of the rear, so that the very long aperture may show. The whorls 
are ornamented with broad furrows and high transverse ribs; on the last 
whorl are counted about 20 ribs. The obtuse nipple-like apex is smooth 
and brownish; the other whorls are nodose-plicate longitudinally; color 
of the shell dully bluish-whitish and rufescent, especially on these places 
where the covering has been destroyed. Some of the growth most strongly 
emphasized toward the aperture. (Translation.) 
Type in Zoology Museum, Copenhagen. Type locality, Sitka, Alaska. 
Range. Pribilof Islands to Aleutian and eastward to Kodiak, Alaska. 
Pyrulofusus harpa dexius Dali, 1907 
Miscellaneous Collections, Smithsonian Institution, 50:164. 
Shell resembling the ordinary type, but with stronger and closer spirals 
and dextrally wound. Long, of shell, 130 mm. (Dali.) 
Type in United States National Museum, No. 110484. Type locality, 
Station 4779, Petrel Bank, Bering Sea. 
Range. Known only from type locality. 
Genus VOLUTOPSIUS Morch, 1857 
Shell large, frequently rude or irregular, with the last whorl largest, 
covered with a thin, inconspicuous, more or less dehiscent periostracum; 
spire short, blunt, beginning with a relatively large, smooth, bulbous 
nucleus; sculpture variable, smooth, spirally striate, or with indistinct 
( 1851 
