BELA. O17 
B. pecussata, Couthouy. PI. 29, figs. 55, 60, 65,69; Pl. 21, figs. 
91, 25; Pl. 28, figs. 35, 36; Pl. 30, fig. 94. 
Shell ovate-fusiform, with a moderate, scarcely turreted spire; 
whorls six or seven, round-shouldered ; with about 24 sigmoid 
longitudinal ribs, evanescing about the middle of the body-whorl, 
close revolving striz cross the ribs; sinus well marked, close to 
the suture ; canal narrowed, but short ; columella nearly straight 
in the middle; color white, yellowish or pinkish white. 
Length, 9 mill. 
New England, northwards ; Labrador ; 
Greenland; Nova Zembla. 
This is B. scalaris (Vahl) of Reeve (Pl. 27, fig. 21) afterwards 
changed to B. borealis. B. leucostoma, Reeve (PI. 27, fig. 25), 
B. reticulata, Vahl, according to Reeve. 
B. tenuicostata, M. Sars (Pl. 28, figs. 35, 36), differs only in 
being smaller, with more numerous ribs. Verrill also describes 
a var. pusilla, having the ribs less prominent and not so much 
bent at the shoulder, giving the shell a smoother appearance. 
Another variety is B. viridula, Moller not of Reeve, and of 
which B. Kobelti, Verkruzen (Pl. 30, fig. 94), is a synonym; 
it is more strongly ribbed with a better defined shoulder 
than the type, the ribs straighter. 8B. incisula, Verrill (Pl. 29, 
fig. 65), appears to me to be no more than a stunted, shouldered 
variety, with straight ribs, apprcaching B. Kobeltt. B.hebes, Ver- 
rill (Pl. 29, fig. 69). and B. pygmea, Verrill (Pl. 29, fig. 60), are 
also varietal forms, having slight distinctive characters, which 
will appear by comparing the figures ; the latter is evidently from 
its small size and fewer whorls a young specimen. B. Trevelyana, 
var. Smithii, Jeffreys, is considered by Verrill a doubtful variety 
of his B. incisula. 
B. Pineett, Moller. PI. 29, fig. 64. 
Shell slender, with elongated spire, and moderately convex 
whorls, with numerous longitudinal, rather straight ribs, excurved 
above, and strong, elevated spiral lines, forming nodules where 
they cross the ribs; pale chestnut-brown, with the canal and 
columella whitish. Length, 11-12 mill. 
Maine; Greenland; Norway. 
Not unfrequently confounded by authors with the next species, 
