186 BUCCINUM. 



than ill the Xoith Atlantic, and the vicinity of Behring's Straits 

 may be considered the metropolis of the sjiecies. It has been 

 erroneously reported as from the Orkuc}' Islands, but is not 

 Britisli. Mr. W. H. Dall, to whose enlightened explorations in 

 Alaska conchology is so greatly indebted, was the first to point 

 out the protean characters of this species and to assign to it a 

 numerous synonymy. I have figured the typical r/laciale (fig. 

 345) and a two-carinated form (fig. 36Y), B. an(/uloxum, Gra}^, 

 evidentl}' not adult (fig. oG8), and regarded by Stimpson as a 

 distinct species, B. carinalvm (fig. 372), B. rutilum (fig. 369), 

 B. /?o?n&e?'fyi(fig-370), and B. Miirchianiim (fig. 371), of Dunker's 

 Novitates. Besides these, B. Stimpsovi and /:.'. Bogersi of (iould, 

 two unfigured species from the vicinit}' of Behring's Straits, are 

 referred to this species by Mr. Dall. 



A^ar. POLARE, Gray. 



This form has been described l)ut not figured ; nevertheless, 

 Stimpson recognizes it as a distinct species differing from B. 

 glaciale in its thin structure, shouldered whorls and narrower aper- 

 ture. B. Grcenlandicum of Hancock (fig. 373), which I consider 

 eciuivalent io polar e^ is also treated as distinct by Stimpson, who 

 says that it is narrower and smaller, without shouldered whorls. 

 Tills latter difference depends upon whether one or two carina 

 are developed on the body-whorl. I think the only reason for 

 considering polare (including Grcenlandicum) as a variety is 

 the thinness of the shell, 



B. MiRANDUM, E. A. Smith. 



Shell ovate, thick, pallid, brownish red, irregularly maculated 

 upon the spiral ribs, iiivestcid with a fugacious, tiiin, light olive 

 epidermis; wliorls seven, concave; and angulated above, concave 

 below tlie angle, longitudinally [)licate, encircled by two nodose 

 ribs, and shallow sulcations, minutely granosely striate, beneath 

 the suture somewhat rugose ; aperture light brown, scarcely more 

 than half the total length, labrura sinuated by the spiral carinas, 

 canal siiort, slightly recurvcul. Length 53, diam. 25 mill. 



East Yesso, Japan ; 11 fathoms. 



The plications which produce nodules on the spiral elevations 

 become almost obsolete on the last half of the body-whorl. The 

 nodidcs number about ten on the penidtimatc whorl. The entire 



