95 



within; surface with fine spiral striation; Ion. of aperture and 

 canal 12, of shell 23 mm.; max lat. 11 mm. 



Type locality: — Off Catalina harbor, Santa Barbara Islands, 

 Cal., in 16 fms., gravel (W. H. Dall, 1873). 



1409 Boreotrophon multicostatus Esch. 



Synonymy: — Fusus multicostatus Esch. 1829. — Trophon gun- 

 neri and Polyplex gracilis Cpr. 1863, not Loven, 1846, or Perry, 

 1811. 



North end of Nunivak Island, Bering Sea, to Mendocino Co., 

 Cal., in 2-5 fms. North coast of Japan, 3-45 fms., some Japanese 

 specimens measuring 46 mm, long with 6 whorls and 9 varices. 



1410 Boreotrophon beringi Dall. 



North end of Nunivak Island, Bering Sea, to Cook's Inlet on 

 the southeast, and northern Japan on the southwest, in 2-81 fms. 



Shell greenish white, elegantly ovate-fusiform, with a rather 

 elongated curved canal, aperture and canal longer than spire; 

 whorls with base gradually attenuated, not constricted, about 6, 

 with a distinct but not deep suture, and 9-12 sharp rounded var- 

 ices, with no obvious angle at shoulder; surface with fine revolv- 

 ing striation, sometimes partly obsolete; aperture white; long. 

 40; max. lat. 17; long, of spire above aperture 16 mm. Oper- 

 culum dark brown. 



1411 Boreotrophon pacific us Dall. 



This resembles B. beringi in miniature except that it has, with 

 the same number of whorls, closer and more numerous varices, 

 and the throat is sometimes pale brownish. Varices 15-20. Larg- 

 est specimens 20-27 mm. long, average about 25 when mature. 



Sea Horse Islands, Arctic Ocean, south to Sitka Harbor, in 

 5-60 fms. 



1412 Boreotrophon disparillis Dall. 



Grays Harbor, Wash., 52-77 fms.; south in deep water to San 

 Pedro channel, Cal. 



1413 Boreotrophon tripherus Dall. 



Type locality: — Off Destruction Island, Wash., in 516 fms. 

 Also found off Tillamook bay, Oregon, in 786 rms. 



1414 Boreotrophon alaskanus Dall. 



Type locality: — Bering Sea north of Unalaska, in 225 fms. 



1415 Boreotrophon mazatlanicus Dall. 



Type locality: — Off Mazatlan, Sin., 995 fms. 



1416 Boreotrophon panamensis Dall. 



Type locality: — Gulf of Panama, in 1,270 fms. 



1417 Boreotrophon avalonensis Dall. 



Shell small, delicate, white, fusiform, with 1 y 2 nuclear and 5 

 subsequent whorls; nucleus tilted, rounded, smooth; subsequent 

 whorls finely spirally striated, with 8 or 9 sharp, appressed var- 

 ices rising into radiant, narrow-grooved spines at shoulder; su- 

 ture very distinct, aperture subovate, canal moderate, more or less 

 recurved, pillar twisted, anteriorly attenuated; base hardly con- 

 stricted; long, of shell 16.5, of aperture and canal 10; max. lat 

 8 mm. 



Type locality: — Off Avalon, in the Santa Barbara channel 

 Cal., in 80 fms. sand. 



