216 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
conspicuously rounded; there is no axial sculpture except faint incremental 
lines, the apical whorls are decorticated; spiral sculpture of incised lines 
with slightly rounded wider interspaces, about a dozen on the penultimate 
whorl quite uniform over the whole of the last whorl; aperture ovate, 
outer lip thin, sharp; inner lip erased, white; pillar short, twisted; canal 
short, rather wide, sometimes recurved. Height of shell, 20; of last whorl, 
14; of aperture, 10; diameter, 9 mm. (Dali.) 
Type in United States National Museum, No. 334438. Type locality, 
United States Fish Commission Station 3282, off Khudubine Island, 
Bering Sea. 
Range. Southern Bering Sea to off Khudubine Island, in S3 fathoms. 
Colus sapius Dali, 1919 
Plate 8, fig. 10 
Proceedings of the United States National Museum, 56 :317. 
Shell small, thin, the apical whorls eroded, but six prominently rounded 
turns remain; suture distinct, not appressed, the whorl in front of it 
flattened and without spiral sculpture for a short distance; the shell is 
white with a straw-colored periostracum; axial sculpture of faint incre¬ 
mental lines; spiral sculpture of (on the penultimate whorl, about eight) 
strong squarish cords with subequal, rather deep, channeled interspaces, 
both slightly wrinkled by the incremental lines and obsolete on the canal; 
there are a few minor spirals behind the posterior cord; aperture roundly 
ovate, outer lip thin, simple, inner lip erased, pillar white, twisted, axis 
pervious; canal rather long, narrow, well-defined, somewhat recurved. 
Height of shell, 22; of last whorl, 15; diameter, 11 mm. (Dali.) 
Type in United States National Museum, No. 122597. Type locality, 
United States Fish Commission Station 2859, southwest of Sitka, Alaska. 
Range. Off Sitka, Alaska, in 1,569 fathoms. 
Colus calathus Dali, 1919 
Proceedings of the United States National Museum, 56:317. Bulletin 112, United 
States National Museum; PI. 8, fig. 2. 
Shell small, thin, white under a straw-colored periostracum, with more 
than six well-rounded whorls, the apex defective; suture distinct, not 
appressed; axial sculpture of faint incremental lines; spiral sculpture of 
(on the penultimate whorl, 13) fine, rounded, low, subequal cords with 
narrower interspaces, the cords at and below the periphery a little more 
close-set, this sculpture covering the whole shell very evenly; aperture 
[216] 
