CLASS GASTROPODA 
189 
Volutopsius simplex Dali, 1907 
Plate 16, fig. 10 
Miscellaneous Collections, Smithsonian Institution, 50 :164. 
Shell large, thin, pale brown, with five or six whorls somewhat con¬ 
stricted at the suture; nucleus large, mammillate, of about two whorls; 
subsequent whorls rather convex, smooth, or marked only by irregulari¬ 
ties of growth or incremental lines; profile fusiform, the last whorl largest 
but not expanded; outer lip arcuate, sharp, slightly thickened but not 
reflected; body without callus; pillar concave, curved to the right, twisted, 
short, with hardly a trace of a siphonal fasciole; canal short, wide, not 
recurved. Long, of shell, 101; of last whorl, 80; of aperture, 57; max. 
diam., 45 mm. (Dali.) 
Type in United States National Museum, No. 110475. Type locality, 
Station 4792 off Bering Island. 
Range. Off Bering Island, Bering Sea, in 72 fathoms. 
Volutopsius attenuatus Dali, 1874 
Plate 4, fig. 3 
Proceedings of the California Academy of Sciences, 5:253. Proceedings of the 
United States National Museum, 24; PI. 36, fig. 3. 
Shell solid, pinkish-white, much attenuated before and behind; spire 
one-quarter shorter than the aperture. Whorls six, apex mammillated. 
Posterior surface of the whorls flattened toward the suture, where they 
are somewhat wrinkled and appressed. Surface of the whorls com¬ 
pletely covered with fine even spiral lines. Aperture long and narrow, 
a thickened callus on the inner lip, and the outer lip slightly reflected. 
Canal long, nearly straight, rather narrow. Long, of shell, 2.33; of aper¬ 
ture, 1.4; lat. of shell, 1 in. (Dali.) 
Type in United States National Museum. Type locality, Cook's Inlet, 
Alaska. 
Range. Arctic Ocean to Pribilof Islands, and Bristol Bay. 
Volutopsius trophonius Dali, 1902 
Procecdmgs of the United States National Museum, 24: 527. Bulletin 112, United 
States National Museum; PI. 8, fig. 11. 
Shell with a short spire and robust body whorl; pale reddish-brown and 
white, with five or more whorls; nucleus of nearly two whorls, smooth, 
inflated, blunt above (diam., 6.5 mm.) ; a subsequent whorl irregular, 
finely spirally striate; after which the whorls develop (on the fifth about 
22) high, thin, sharp, flexuous varices or lamellae extending entirely over 
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