376 THE CANADIAN NATURALIST. [Oct. 



ciniens of both forms can be obtained in sufficient numbers. If so, 

 I would suggest the name Buccinum Packardi for the Portland 

 form. It is easily distinguished from B. undulatum by the flat- 

 tening and finer striation of the primary ridges, which are also 

 much broader than the corresponding grooves. 



I have also a fragment of the form Packardi from the Pleisto- 

 cene of New Brunswick, sent by Mr. G. F. Matthew. 



Buccinum tenue Gray. 



Buccinum tenue Gray, Zool. of Beechey's Voy. (1839), 128 ; xxxvi, 19. 

 Reeve, Conch. Ic. iii (1846), Buc., iv, 27. 



Buccinum scalariforme Beck, in Kroyer's Tidsskrift, iv (1842), 84. 

 Moerch, in Rink's ■ Groenland,' Tillaeg, (1857), Aftr. 84. Packard, Cana- 

 dian Naturalist, viii (1863), 417. Dawson, Canadian Naturalist [2], ii 

 (1865), 88. 



Tritonium {Buccinum) tenue Middendorff, Malac. Rossica (1849), 172 ; 

 vi, 5, 6. 



Buccinum tortuosum Reeve, Conck. Ic, ii (1847), Buc, xiv., 115 (mal- 

 formation). 



Shell of moderate size, thin or only moderately thick, elongated, 

 turreted ; spire produced ; suture deep ; whorls subcylindrical, not 

 carinated, but convex or shouldered near the suture. Longitudinal 

 folds very numerous, more so than in any other species, between 

 twenty-five and thirty in number, mostly arising at the suture, but 

 sometimes interpolated at the middle of the whorl. The folds, 

 between which the interpolated ones occur, are often interrupted 

 before completing their normal length. There are no primary ridges 

 or grooves. The secondary grooves are exceedingly numerous, 

 almost microscopic, but plainly conspicuous, evenly distributed and 

 crowded, sharp-cut, and minutely waved or shagreened by the lines 

 f growth. Sometimes deeper and shallower grooves alternate with 

 each other, either singly, or by two or three of the shallow ones to 

 one of the deeper kind ; the difference never, however, being so 

 great as to suggest a division of the grooves into primaries and 

 secondaries. Aperture a little more than two-fifths the length of the 

 shell, short and broad. Columella projecting beyond the outer lip, 

 and having its three folds rather conspicuous, the middle one being 

 generally quite prominent, more so than the upper one, but not 

 tooth-like. Outer lip thickened, slightly patulous and projecting 

 below in full grown specimens ; and very little sinuous, the sinus 



