CLASS GASTROPODA 
255 
Buccinum angulosum Gray, 1839 
Plate 5, figs. 1, 2, 3; Plate 17, figs. 9, 10 
Beechey’s Voyage to the Pacific, etc., Zoology, 127; PI. 36, fig. 6. 
Shell ovate, conical, solid, white, very closely and wavedly spirally 
striated; upper whorls fluted, distantly and strongly plaited, the last 
angular, and the middle strongly plaited, like the upper whorl behind, 
and plain in front, the plait ending in a prominent tubercle. (Gray.) 
Long., 55 mm. (Oldroyd.) 
Type in British Museum? Type locality, Icy Cape, Arctic. 
Range. Bernard Harbor, Arctic coast, to Point Barrow and vicinity 
of Bering Strait. 
Buccinum angulosum normale Dali, 1885 
Plate 5, fig. 6 
Ray, Polar Expedition to Point Barrow, Report, 179; PI. 3, fig. 1. 
The normal form was obtained by the expedition on the beaches near 
the station and at Cape Smythe; thence to five fathoms. The fine sculp¬ 
ture, and especially the sharp transverse striae, always distinguish it from 
the other species. (Dali.) 
Type in United States National Museum, No. 40966-7. Type locality, 
Cape Smythe. 
Range. Arctic Ocean from Point Barrow to Kotzebue Sound. 
Buccinum angulosum cnismatopleura Dali, 1919 
Plate 12, fig. 4 
Proceedings of the United States National Museum, 56:328. 
Shell thin, variable in height, the type-speciman short, acute, with 
five whorls exclusive of the (lost) nucleus, separated by a distinct suture; 
axial sculpture of (on the penultimate whorl, eleven; on the last whorl, 
eight) stout ribs with equal (on the spire) or wider (on the last whorl) 
interspaces; on the spire these extend from the suture to suture without 
special prominence on any one part of the whorl, but on the last whorl 
they are adolescent near the suture and on the base, but on the periphery 
are very prominent, as if pinched and pulled out, rudely and irregularly; 
the incremental lines are inconspicuous; the spiral sculpture is like that 
of the typical form, fine similar uniform striae now and then fasciculated 
by deeper grooving; aperture wide, outer lip flexuous, thin; body erased, 
pillar short, straight, canal wide, deep recurved with a strong fasciole. 
Height of shell, 48; of last whorl, 40; diameter, 36 mm. (Dali.) 
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