1865.] REVIEW OF THE NORTHERN BUCCINUMS. 385 



apparently much more numerous than in that species, the'niouth 

 more patulous, and the columella more distinctly folded. 



Buccinum Tottenii, nov. sp. 



Buccinum ciliatum Gould, Inv. Mass. (1841), 307 (in part). Dawson, 

 Can. Nat., ii (1857), 415, pi. vii, fig. 5 (not of 0. Fabr). 



Shell of moderate size, white, of a light and thin structure ■ 

 spire acute ; suture impressed, whorls seven, regularly convex, 

 neither carinated nor angulated. Longitudinal folds about twenty- 

 two in number to each whorl, very regular, straight, not at all 

 oblique, and about equaling their interspaces in width. These 

 folds are prominent on the spire, but usually obsolete on the body- 

 whorl, except occasionally at the suture. The transverse striation 

 is somewhat as in B. undatum, but sharper and more regular, and 

 the grooves are narrower and more deeply cut. The primary 

 ridges are very numerous and crowded, less projecting than in B. 

 undatum, but differing among themselves in strength, the narrower 

 and less prominent ones usually alternating by threes or fours with 

 the stronger ones. The primary grooves are much narrower than 

 the corresponding ridges. The secondary grooves are few in 

 number, occurring for the most part only on the greater ridges, 

 and, as usual in the undatum group ; they are not easily distin- 

 guished from the smaller primaries. Aperture rather broad, and 

 half as long as the shell; outer lip thin, effuse, and projecting 

 below, and with its superior sinus very broad and shallow, or ob- 

 solete ; folds of the columella little prominent. Color within the 

 aperture white or pale yellowish. Periostraca light yellowish, short- 

 ciliated with triangular fimbriae at the intersections of the lines of 

 growth with the transverse striae. 



Length, 2.12; breadth, 1.3 inches. 



Several specimens of this species, from the Banks of Newfound- 

 land, are in the museum of the Smithsonian Institution, donated 

 by the late Gen. Totten of the United States Engineer corps, to 

 whom I have dedicated it, in recognition of his early investigations 

 in the conchology of our Eastern coast. According to Principal 

 Dawson, this species occurs in the Pleistocene beds of Montreal. 



It is allied to B. Humphrey sianum, but differs in its plicated 

 and more convex whorls, deeper transverse sculpture, and want of 

 color. It might be taken for a thin and delicate form of B. undu- 

 latum, but is easily distinguished by the number and straightness 



Vol. II. z No. 5. 



