BELA. 915 
prominent ones on the penultimate and body-whorl; chestnut to 
violaceous brown. Length, 8°5-11 mill. 
Cape Cod, Mass., to Greenland ; Iceland, 
Norway, Spitzbergen. 
Jeffreys declares the previous species closely allied to this and 
Leche makes them identical specifically. 
B. violacea, Mighels and Adams (figs. 33, 34), differs from the 
typical form only in being a little larger and stouter, with the 
two carinz on the upper whorls less evident; this is due partly 
to erosion, partly to age; the perfect young of the species being 
typical, the adults or eroded young of the form violacea. The 
synonymy includes B. cylindracea, Moller, B. Beckii, Moller, B. 
livida, Moller (PI. 27, fig. 26), B. Greenlandica, Reeve (PI. 27, 
fig. 18, 3), B. brevis, Leche, B. ventricosa, Morch, and B. rugu- 
lata (Moller), Reeve (Pl. 27, fig. 31). 
B. Novasa-SemiJsensis, Leche. PI. 33, fig. 66. 
Shell yellowish ash-color; finely and equally decussated by 
longitudinal and revolving lines; whorls with a narrow shoulder. 
Length, 8 mill. 
Nova Zembla. 
B. PYRAMIDALIS, Strém. Pl. 30, fig. 92; Pl. 28, figs. 40,47; PL 
27, fig. 30; Pl. 33, fig. 72; Pl. 34, fig. 81. 
Shell with usually a rather high spire, seven or eight tolerably 
convex whorls, scarcely or not at all shouldered, ribs 13 to 16, 
sigmoid, fading out about or above the middle of the body-whorl ; 
there are numerous, fine, close revolving lines, sometimes not 
apparent on the ribs; pale chestnut-color, when fresh. 
Length, 13 mill. 
Massachusetts to Greenland ; Iceland, Norway, 
Spitzbergen, Nova Zembla. 
Varies considerably in the elevation of the spire and in stout- 
ness, as well as in the development of the ribs. Prof. Verrill 
doubts the identity of B. pleurotomaria, Couthouy (Pl. 30, fig. 
92) with this species, and considers B. pyramidalis, as figured 
by Sars (PI. 28, fig. 40), at any rate different from pleuroto- 
maria; but I find all the forms that have been referred to this 
Species by Jeffreys, Leche and others well within the usual 
varietal limits of similar species. I therefore consider the fol- 
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