CLASS GASTROPODA 
203 
Type in United States National Museum. Type locality, U.S.S. 
“Albatross” Stations 3227 and 2919, off Unalaska Island. 
Range. Pribilof Islands, Alaska, to Tillamook Bay, Oregon. 
Ancistrolepis eucosmius bicinctus Dali, 1919 
Proceedings of the United States National Museum, 56:312. 
Shell resembling typical eucosmius, but with, on the spire, only two 
strong spiral ridges, equidistant from the sutures, and on the base three 
more adjacent, smaller, and diminishing in size and separation toward 
the canal. The surface is covered with a delicately reticulated, velvety 
periostracum of a pale olive color over white shelly matter. Operculum 
is normal. Height, 28; diameter, 17 mm. (Dali.) 
Type in United States National Museum, No. 122673. Type locality, 
United States Fish Commission Station 3337, southeast of Unalaska. 
Range. Pribilof Islands to Shumagin Islands, Alaska, in 34-280 
fathoms. 
Ancistrolepis magnus Dali, 1895 
Plate 25, fig. 5 
Proceedings of the United States National Museum, 17 :709; PI. 29, fig. 5. 
Shell rather thin, with six whorls, covered by a thick pilose epidermis; 
whorls flattened or channeled near the suture and with a single strong 
keel at the shoulder, the surface covered with fine spiral threads crossed 
by rather prominent lines of growth; pillar short, normally much twisted 
and the coil pervious for one whorl, but some specimens attacked by 
annelids have it nearly buccinoid; aperture ample, the body with more 
or less callus laid over it, the outer lip not reflected; siphonal fasciole 
rather indistinct; operculum solid, black, rather short, concave, its out¬ 
line like that of a half-shut fan. Height of shell, 75; max. diam., 50; 
length of aperture, 47 mm. (Dali.) 
Type in United States National Museum, Nos. 122674 and 122675. 
Type locality, Station 3254, in Bering Sea. 
Range. Okhotsk and Bering Seas, 25-70 fathoms. 
Ancistrolepis californicus Dali, 1919 
Plate 9, fig. 9 
Proceedings of the United States National Museum, 56:313. 
Shell of moderate size, solid, white, with an olivaceous periostracum, 
with about seven whorls, excluding the (defective) nucleus, with the 
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