CLASS GASTROPODA 
125 
Type in United States National Museum, No. 207218. Type locality, 
U.S. Fish Commission Station 3128, off Monterey Bay, California. 
Range. Monterey Bay, California, to Coronado Islands, in deep water. 
Polinices canonicus Dali, 1919 
Proceedings of the United States National Museum, 56:353. 
Shell small, white under a pale yellowish periostracum, with more than 
four whorls, the nucleus eroded; suture distinct, narrow, almost chan¬ 
neled; axial sculpture of incremental lines and numerous small irregular 
wrinkles radiating from the suture and extending on the average about 
halfway to the periphery; there is no spiral sculpture; base rounded with 
a small perforate umbilicus partly overshadowed by a narrow reflection 
of enamel from the pillar lip; aperture semilunate, simple, the body pillar, 
and posterior commissure with a liberal coating of enamel. Height of 
shell, 8; of aperture, 5; of diameter, 7 mm. (Dali.) 
Type in United States National Museum, No. 209411. Type locality, 
U.S. Fish Commission Station 2923, off San Diego, California, in 822 
fathoms. 
Range. Off Alaska Peninsula in 2,923 fathoms, and off San Diego, 
California, in 822 fathoms. 
Polinices monteronus Dali, 1919 
Proceedings of the United States National Museum , 56:352. 
Shell of moderate size, of a dark greenish-olive color with a whitish 
base; whorls about five, the nucleus decorticated; the surface smooth 
except for faint incremental lines, the suture distinct, not appressed; base 
rounded, whitish, the umbilicus narrow, filled below with enamel, with a 
minute perforation above forming a notch-like gap between the white 
enamel of the inner lip and that of the umbilicus; outer lip thin, sharp; 
body with a thick coat of enamel, pillar lip much thickened, white; oper¬ 
culum dark brown, of about two whorls. Height, 19; diameter, 18 mm. 
(Dali.) 
Type in United States National Museum, No. 220856. Type locality, 
Station 1199, Captains Bay, Unalaska, in 75 fathoms. 
Range. Arctic Ocean, Bering Sea, and the Aleutians. 
Polinices politianus Dali, 1919 
Proceedings of the United States National Museum, 56:353. 
Shell small, white, covered with a pale brown dehiscent periostracum; 
whorls four and a half, the nucleus decorticated, the specimens probably 
[727 ] 
