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226 American Seashells
small (but larger and fewer than those in temie), and limited to the upper
fourth of the whorl. Spiral sculpture of numerous rough, but microscopic,
incised lines. Color grayish white. Common offshore in cold water. Do not
confuse with B. tenue.
Buccinum glaciale Linne Glacial Buccinum
Plate 24t
Arctic Seas to Washington State. Arctic Seas to the Gulf of St. Law-
rence.
2 to 3 inches in length, fairly thick-shelled, but light in comparison to
its size. Characterized by its thick, flaring, turned-back outer lip, and by the
2 wavy, strong spiral cords on the periphery of the whorl. Spiral incised
lines numerous. Color mauve-brown. Aperture cream with a purplish flush
within. Common from low tide to several fathoms in the Arctic region.
Buccinum baeri Middendorff Baer's Buccinum
Bering Sea.
Plate 24V
I to 2 inches in length, resembling a thin, beach-worn Thais lima. Aper-
ture about % the length of the shell. Rather thin, smoothish, except for m.i-
croscopic, incised spiral lines. Color drab grayish with purplish to reddish
undertones. Periostracum, when present, is thin, translucent and light-brown.
Operculum V5 the size of the aperture. Commonly found washed ashore on
the beaches of Alaska and the Aleutians. A very unattractive shell.
Genus Volutopsius Morch 1857
Subgenus Volutopsius s. str.
Volutopsius castaneus Morch Chestnut Buccinum
Alaska.
Figure 51c
2.V2 to 3^4 inches in length, rather solid; with 4 whorls; aperture large
and slightly flaring. Interior brownish white enamel. Columella slightly
arched, white within, brown on the parietal wall. Exterior surface brownish
and smoothish, except for coarse axial wrinkles appearing more as deform-
ities in growth. Moderately common on rocks below low-water mark.
Subgenus Pyrulofusus Morch 1869
Volutopsius barpa Morch Left-handed Buccinum
Alaska.
Plate 24P