368 THE CANADIAN NATURALIST. [Oct. 



thinner, and less strongly grooved; also in having more, rounded 

 whorls and a longer columella. 



Moerch changes the name of this species, because he considers 

 the name groenlandicum to have been used by Chemnitz for 

 another species. Chemnitz however was not, in the " Conchylien 

 Cabinet," a binomial writer, and we are not authorised by the laws 

 of priority to take the second word of his descriptive phrase as a 

 specific name. 



Buccinum glaciale Linn. 



Buccinum [glaciale Linn., Syst.. Nat. Ed. 10 (1758). Chemnitz. 

 Scbrift. Berlin Gesell. naturf. Freunde, vi (1785), 317 ; vi, 4, 5. Kiener, 

 Icon. Buc. (1841), 6 ; ii, 4 : Reeve, Conch. Icon., iii (1846), Buc, iii, 18. 

 Gray, Proc. Zool. Soc. 1850, 14. 



Tritonium {Buccinum) glaciale Middendorff, Malac. Rossica (1849), 168 ; 

 iv. 11 ; excl. synon. 



Buccinum carinatum Phipps, Voy. 



Tritonium glaciale 0. Fabricins, Fauna Groenl. (HSO), 397. Moercb, in 

 Rink's Groenland Tillaeg (1857) ; Aftryk 84. 



Shell thick and strong, ovate ; spire regularly conical^; suture not 

 at all impressed. Whorls six or seven, flattened, usually with a very 

 strono- carina commencing at the upper extremity of the aperture 

 and ano-ulating the body-whorl. Sometimes there is another, less 

 conspicuous or obsolete carina above the principal one. Folds ten 

 to twelve, longitudinal, or very little oblique, not very strong, and 

 often obsolete on the body-whorl. Spiral grooves as in B. polarc. 

 Aperture in the adult patulous, short, a little less than half as long 

 as the shell, and broad, broader than long. Columellar lip very 

 short, shorter than the outer lip, which reaches beyond it below, 

 oblique, almost straight and not incurved above. Outer lip much 

 thickened, reflected, very strongly sinuated at a point usually just 

 above the juncture of the carina, and very much projecting or 

 patulous below. Periostraca not ciliated, generally smooth, some- 

 times simply wrinkled at the crossings of the lines of growth with 

 the spiral stria?. 



Operculum sub-circular, nucleus sub-central. 



Length, 3.05; breadth, 1.90 inch. 



This species is very common in Behring's Straits and the Arctic 

 Ocean north of it. In the Museum of the Smithsonian Institu- 

 tion there are numerous specimens collected in those seas by 

 the author of this paper while acting as naturalist to the North 

 Pacific Expedition. I have also specimens from Greenland, where 



