84 
19, as broad as their interspaces, and most prominent near the suture; they are cur- 
ved in a somewhat sigmoid form and are sometimes, though rarely, interrupted or have 
an intervening fold about the middle of the whorls. The striation of the surface has con- 
siderable resemblance of that of B. glaciale, the primary grooves being deep cut, with the 
intervening ridges depressed. But the grooving is far less regulär than in that species, 
the primary grooves are more crowded near the suture and the ridges less flattened. The 
secondary grooves on the surface of the primary ridges are usually as fine as in B. gla- 
ciale, but often one or more of them become deeper, making the sculpture resemble more 
that of angulosum. Aperture oval, less than ^2 of shell and narrower than in B. tenue. 
The columella does not project beyond the level of the anterior pari of the outer lip, but 
rather falls short. The columella shows the usual three folds, but the middle fold being 
nearly longitudinal and parallel to the lowermost fold, the latter cannot be seen in a front 
view, but it is easily seen in a edge view of the columella (in broken specimens of the 
Shell) separated from the marginal middle fold by a longitudinal sulcus. The first and 
second folds are separated by a brood deep sinus. Periostraca tliin, smooth, not ciliated. 
Length 2,25, breadth 1,2". — Another specimen is 2,5" long, proportionally slender. 
Buccinum plectrum Stimpson in the Canadian Naturalist 1865 p. 374. 
Aufenthalt im arctischen Ocean nördlich der Behringsstrasse hei 25 — 30 Faden 
Tiefe von Rodgers gedrakt. Auch bei den Anachi Islands an der Südseile von 
Alaschka von Dali gefunden. 
Anmerkung. Die mir von Dali übersandle Photographie war leider nicht son- 
derlich gelungen, doch wird sie genügen, um in Verbindung mit der ausführlichen 
Beschreibung Slimpsons eine Vorstellung von der interessanten hochnordischen Art 
zu geben. Sie hat, wie Stimpson ganz richtig sagt, die Gestalt und auch ungefähr 
die Faltenfaildung von B. tenue, aber die Sculptur von glaciale. JelFreys vereinigt sie 
mit B. Totteni, was mir der schiefen Falten wegen unthunlich erscheint. 
58. Buccinum castaneum Dali. 
Taf. 91. Fig. 5. 
Shell large, clair chestnut brown, with whorls seven in number, inflated and smooth 
except for microscopic, closely crowded revolving striae, Suture distinct, not chanelled. 
Apex rather acute, pointed. Columella straight, with a faint fasciole. Aperture wide, 
