CLASS GASTROPODA 
225 
whorls moderately convex, somewhat appressed toward the suture. Canal 
rather long, much recurved; aperture elongate, acute behind; inner lip 
much thickened, posteriorly waved. Shell covered with a yellow-brown 
epidermis, with very faint revolving striae, crossing the slightly evident 
waved lines of growth. Long., 1.7; lat., 0.8; long, apert., 0.95 in. (Dali.) 
Type in United States National Museum. Type locality, Sanborn 
Harbor, Nagai. 
Range. Nunivak Island, Bering Sea to San Diego, California, in 
65-293 fathoms. 
Colus jordani Dali, 1913 
Plate 16, fig. 5 
Proceedings of the United States National Museum, 45:588. Bulletin 112, United 
States National Museum; PI. 12, fig. 7. 
Shell of moderate size of about seven and a half whorls, the nucleus 
rounded, not swollen but rather large; suture distinct, the whorls mod¬ 
erately rounded; surface covered with a dark orange-brown periostracum, 
beneath which the shell substance is white; sculpture of incremental lines, 
not prominent but regular and close-set, crossed by numerous flat spirals 
with very narrow interspaces, this sculpture covering the whole surface, 
the spirals being slightly narrower in front of the suture; on the periphery 
of the last whorl there are about two spirals with their interspaces the 
width of one millimeter; aperture less than half the length of the shell; 
canal wide, short, sharply recurved; outer lip simple, flexuous, expanded, 
receding behind the periphery and advancing near the suture, connected 
over the body with the pillar by a thin layer of white; operculum ovate, 
with apical nucleus, dark brown. Height of shell, 43; of last whorl, 31; 
of aperture, 20; max. diam., 21. (Dali.) 
Type in United States National Museum. Type locality, Sucia Island, 
Gulf of Georgia, in 67 fathoms. 
Range. Bering Sea, 70-100 fathoms; British Columbia, 67-142 
fathoms; Monterey Bay, California, 633 fathoms. 
Colus aphelus Dali, 1889 
Plate 13, fig. 3 
Proceedings of the United States National Museum, 12:325; PI. 6, fig. 7. 
Shell small, bucciniform, six whorled, smooth, covered with a greenish- 
gray epidermis; nucleus minute, eroded; whorls full, well-rounded; suture 
distinct, not deep, nor channeled; sculpture only of faint incremental 
lines and a few obscure spiral traces; aperture moderate, the outer lip 
[ 225 ] 
