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 



Plate 24V 



Bering Sea. 



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 



Figure 51c 



Alaska. 



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 bar pa Morch Left-handed Buccinum 



Plate 24P 



Alaska. 



