188 BUCCINUM. 



liratus, and were passed over as such l)}- me, in the field. After- 

 wards, when the carina; and lip are fully formed, they look like 

 brown B. glacials of the carinated form. On examination, the 

 sculpture was found to be essentially' ditferent, and by that alone 

 its connection with B. castaneum is surmised. It is fonnd in the 

 Western Aleutians only, and was caught with bait in five fathoms. 

 No intermediate specimens have been observed. Length o-08 

 inches, width 1-5 inches ; aperture long, 1-25 inches; wide, -9 inch. 

 The lip is less thickened than the t^'pical B. castaneum. 



The above is a"copy of Ball's description. I am unacquainted 

 with the species. 



B. CYANEUM, Brug. PI. 76, figs. 331-342; PI. 78, tig. 375. PI. 

 79, figs. 377-380. 



Shell thin, whorls six to eight, not very convex, flattened near the 

 suture, and generally smoother than in an}' other species ; longi- 

 tudinal folds, when the}' exist, ten to fifteen, straight, extending 

 very little below the suture ; primary spiral ridges rounded, not 

 flattened, very narrow and distant, about fourteen on the lower 

 whorl, often obsolete, but sometimes sufl[iciently prominent to 

 form angles rather than ridges ; secondary ridges, when present 

 about five to each primary ridge and groove taken together. 

 Colors bright but variable, usually bluish with chestnut-brown 

 revolving lines or series of spots or patches : sometimes brown 

 Avith white spots. Periostraca smooth or short-ciliated. 



Length, 1-2*3 inches. 



Greenland, Nonoay, Lapldiul, Behrim/s Straits. 



An arctic species ; occurs fossil in the pleistocene of Riviere- 

 du-Loup, Canada. A number of authors appl}' to this shell the 

 name Grfenlandicum, Chemn., which I do not adopt because 

 Chemnitz was not a binomial writer, and G rcenlandicuin is only 

 a portion of his compound designation of the species. 



I figure a variety ixdula^ Sars. (fig. 332), which appears to coi*- 

 respond with the dwarf variety- of Stimpson ; also Neptunea 

 Baerii, Midd. (fig. 377), which is a marked, short, convex 

 variety. The following species described hy Hancock, are all 

 synonymous with cyanewm, viz.: B. Ju/flrojthaiium, Hanc. (figs. 



