36 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
throat is sometimes pale brownish. The varices number from 15 to 20, and 
the largest specimens measure from 20 to 27 mm. in length. (Dali.) 
Type in United States National Museum, No. 109100. Type locality, 
Bering Sea? 
Range. Arctic Ocean to Kamchatka to Acapulco, Mexico. 
Trophon peregrinus Dali, 1902 
Plate 33, fig. 12 
Proceedings of the United States National Museum, 24:543. 
Shell small, yellowish-white, with eight whorls; nucleus rounded, 
smooth, tilted, with a whorl and a half; subsequent whorls with seven or 
eight procumbent broad varices, strongly angulated at the shoulder, where 
the varices form compressed elevated spines; behind the angle the whorl 
is somewhat excavated; base of the whorl constricted with a short, re¬ 
curved, imbricate canal; aperture squarish, white within; surface with fine 
spiral striations. Long, of aperture and canal, 12; of shell, 23; max. lat., 
11 mm. (Dali.) 
Type in United States National Museum. Type locality, Catalina Har¬ 
bor in 16 fathoms. 
Range. Known only from type locality. 
Trophon staphylinus Dali, 1919 
Proceedings of the United States National Museum,, 56 :338. 
Shell white, slender, subturreted, of five or more whorls, the apex lost; 
suture distinct; axial sculpture of (on the last whorl, seven) sharp-edged 
varices, prominent only at the shoulder where they are produced into a 
small spine; there is no spiral sculpture except the angle at the shoulder; 
aperture obovate, simple; canal long, narrow, recurved; the body with a 
coat of enamel, the pillar very short; operculum normal. Height of spire, 
9; of aperture, excluding the canal, 5.5; the canal, 6.5; diameter, 8 mm. 
(Dali.) 
Type in United States National Museum, No. 209947. Type locality, 
United wStates Fish Commission Station 4415, off Santa Barbara Island, 
California. 
Range. Sitka, Alaska, to Coronado Islands. 
Trophon calliceratus Dali, 1919 
Proceedings of the United States National Museum, 56 :338. 
Shell small, white, with a smooth nucleus of one and a half whorls and 
ve subsequent whorls; suture distinct, not appressed; varices sharp, a 
spine rising nearly vertically from the shoulder, guttered and slightly re- 
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