CLASS GASTROPODA 
245 
Buccinum pemphigus major Dali, 1919 
Proceedings of the United States National Museum, 56 :325. 
Male shell, large, thin, inflated, white, with an adherent olivaceous 
periostracum, with seven whorls exclusive of the minute (eroded) nucleus; 
suture distinct, spiral sculpture of a low narrow keel at the shoulder and 
numerous flattish, close-set, usually paired or duplex threads, uniformly 
covering the whole surface; incremental lines inconspicuous; aperture 
wide, white, the outer lip thin, narrowly reflected; body and pillar with a 
glaze of enamel; pillar short, straight; canal wide, short, somewhat re¬ 
curved, with a moderate fasciole; operculum large, rounded triangular 
with subcentral nucleus. Height of shell, 86; of last whorl, 64; of aper¬ 
ture, 50; diameter, 55 mm. (Dali.) 
Type in United States National Museum, No. 225248. Type locality, 
United States Fish Commission Station 3643, western Bering Sea. 
Range. Western Bering Sea and south to Japan. 
Buccinum pemphigus orotundum Dali, 1907 
Plate 14, fig. 8 
Miscellaneous Collections, Smithsonian Institution, 50:152. Bulletin 112, United 
States National Museum; PI. 12, fig. 9. 
Shell acute, short, very wide, of a creamy or pinkish white, covered 
with a thin dehiscent periostracum, having about six whorls; suture dis¬ 
tinct, appressed, with a few small irregular axial plications in front of it, 
especially on the apical whorls; spiral sculpture of low, fine, sharp, sub¬ 
equal threads, of which a few, especially near the canal, are more promi¬ 
nent, having three or four less prominent ones between them; the inter¬ 
spaces are, as a rule, wider, and are reticulated by incremental lines; 
aperture wide patulous, yellowish within; outer lip thin, sharp, expanded, 
flexuous behind, slightly thickened within; body white, glossy; pillar 
white, arcuate, with a thin layer of callus; canal wide, deep, recurved, 
forming a conspicuous fasciole with a wide channel behind it; operculum 
large, brown, with a subcentral nucleus. Long, of shell, 60; of last whorl, 
50; of aperture, 39; max. diam., 40 mm. (Dali.) 
Type in United States National Museum, No. 110538. Type locality, 
Station 3254, north of Unimak Island, Bering Sea. 
Range. Nunivak Island, Pribilof, and Unimak Islands, Bering Sea. 
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