CLASS GASTROPODA 
213 
Type in United States National Museum, No. 210130. Type locality, 
U.S. Fish Commission Station 3504, near the Pribilof Islands, Bering Sea, 
in 34 fathoms. 
Range. Arctic Ocean to off Pribilof Islands, Bering Sea. 
Margarites frigidus Dali, 1919 
Proceedings of the United States National Museum, 56:357. 
Shell small, polished, conic, pale flesh color, of six whorls, including a 
minute subglobular nucleus; suture distinct, not appressed, whorls only 
moderately rounded; axial sculpture of faint incremental lines, spiral sculp¬ 
ture of a few very faint lines near the umbilical region; base rounded, 
imperforate; operculum pale brown with about 8 turns; aperture rounded, 
slightly angular above, outer lip simple sharp, body with a thin nacreous 
glaze, pillar lip rounded, broader than the rest; height of shell, 9; of last 
whorl, 6.5; of aperture, 3; diameter, 6 mm. (Dali.) 
Type in United States National Museum, No. 223423. Type locality, 
Arctic Ocean north of Bering Strait. 
Range. Arctic Ocean and south to Nunivak Island, Bering Sea, and 
Windfall Harbor, Admiralty Island, Alaska. 
Margarites marginatus Dali, 1919 
Plate 99, figs. 1, 2 
Proceedings of the United States National Museum, 56:367. 
Shell small, thin, trochiform, pale gray or pink, with a minute glassy 
nucleus and about five subsequent whorls; suture distinct, rather deep, in 
front of it the last whorl is marginated by a series of eight or more slightly 
arcuate broad convex waves with narrow interspaces, extending about half¬ 
way to the periphery which is somewhat angular though not distinctly 
keeled; other spiral sculpture of minute almost microscopic striae over the 
whole surface; base moderately convex with a narrow umbilicus; aperture 
rounded, simple, the margin not expanded, the body with a thin layer of 
enamel uniting the lips, the pillar lip not reflected, slightly thickened; the 
operculum pale with six or more turns; larger diameter, 6.5; shorter 
diameter, 5; height, 5 mm. (Dali.) 
Type in United States National Museum, No. 109464. Type locality, 
Adakh Island, Aleutians. 
Range. Arctic Ocean and Bering Sea, south to Oregon; also Atlantic. 
Margarites hypolispus Dali, 1919 
Proceedings of the United States National Museum, 56:367. 
Shell small, solid, turbinate, pale flesh color, polished, smooth, with five 
well-rounded whorls, including a minute subglobular nucleus; suture very 
[815 1 
