226 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
thin, very slightly reflected, flexuous; body and pillar lips white, polished, 
without callus; pillar short, strong, recurved, obliquely truncate anteriorly, 
well-recurved; canal short, wide, well-defined, and recurved; throat 
smooth, white; axis not pervious; operculum normal. Max. long, of 
shell, 30; max. lat., 15 mm. (Dali.) 
Type in United States National Museum. Type locality, Station 2839, 
in 414 fathoms, off Santa Barbara County, California. 
Range. Chirikoff Island, Alaska, to San Diego, California, in 290-626 
fathoms. 
Colus halibrectus Dali, 1891 
Plate 25, fig. 9 
Proceedings of the United States National Museum, 14:188; PI. 29, fig. 9. 
Shell much like a miniature Chrysodomns acosmius, with six whorls 
which are less flattened, weaker and finer spiral striae, a longer canal, 
pink color on the pillar, and more appressed suture; the lip is thickened 
and a little reflected and there is a thin callus on the body. Length of 
shell, 35; of aperture, 17; breadth of shell, 13.5 mm. (Dali.) 
Type in United States National Museum. Type locality, U.S.S. “Alba¬ 
tross” Station 3330, off coast of Akutan Island, Bering Sea, in 351 
fathoms. 
Range. Southern Bering Sea, near Unalaska Island, 351-399 fathoms. 
Colus clementinus Dali, 1919 
Plate 8, fig. 9 
Proceedings of the United States National Museum, 56 :321. 
Shell small, white, with a greenish-olive periostracum, and more than 
five rounded whorls, the apex decorticated; suture distinct, not appressed; 
axial sculpture of irregularly prominent incremental lines; spiral sculp¬ 
ture of a few irregular interrupted spiral threads, probably accidental, 
and some feeble grooves near the canal; surface practically smooth, 
almost polished; aperture semilunate, the outer lip thin, arcuate, body 
with a coat of white enamel, the pillar white, short, twisted, attenuate 
in front; canal wide, short, slightly recurved. Height of shell, 21; of 
last whorl, 15; of aperture, 11; diam., 10 mm. (Dali.) 
Type in United States National Museum, No. 208912. Type locality, 
United States Fish Commission Station 4405, between Santa Catalina 
and San Clemente Islands, in 654-704 fathoms. 
Range. Monterey Bay to San Diego, California. 
[226 ] 
