CLASS GASTROPODA 
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leaving a thin, pellucid, smooth shell, for the outer coat alone is striated, 
and in most of the shells it forms the longitudinal plaits. (Gray.) 
Type in British Museum? Type locality, Icy Cape, Arctic. 
Range. Arctic Ocean-Aleutian Islands and Straits of Juan de Fuca. 
Buccinum tenue rhodium Dali, 1919 
Plate 22, fig. 1 
Proceedings of the United States National Museum, 56:324. 
Shell large, rude, with much emphasized more or less broken irregular 
ribs and a conspicuous reddish-brown periostracum, with more than seven 
wliorls, a deep suture, and cream-colored enamel. Type specimen meas¬ 
ures 89 in length, with a diameter of 40 mm. (Dali.) 
Type in United States National Museum, No. 224069. Type locality, 
Plover Bay, near Bering Strait. 
Range. Plover Bay, near Bering Strait, in 8-25 fathoms. 
Buccinum tenue lyperum Dali, 1919 
Plate 9, fig. 8 
Proceedings of the United States National Museum, 56:324. 
Shell has a strongly constricted suture and about six rotund whorls, 
with the axial sculpture largely obsolete and the periostracum a very 
dark olive. In its other characters it agrees with the normal type of the 
species. Long., 52; diam., 32 mm. (Dali.) 
Type in United States National Museum, No. 225611. Type locality, 
southwestern Bering Sea. 
Range. Southwestern Bering Sea, in 100 fathoms. 
Buccinum solenum Dali, 1919 
Plate 12, fig. 1 
Proceedings of the United States National Museum, 56:325. 
Shell of moderate size, acute, white under a dehiscent straw-colored 
periostracum, with a strongly constricted suture and about six slightly 
shouldered, somewhat rotund whorls, exclusive of the (lost) nucleus; 
the whorls of the spire are numerously ribbed (about 20 on the penul¬ 
timate whorl), with slightly oblique riblets most emphatic on the shoulder, 
obsolete at the periphery and on the last whorl; the incremental lines 
are prominent, close, and thread-like; spiral sculpture of very minute, 
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