BEL A. 219 



revolving striae, the sculpture cancellated ; aperture broadly 

 truncate below. Length, 22 mill. 



Norway, Faroe Islands. 

 Yar. augustior, Jeffreys, is said to be narrower and smaller. 



B. OBLTQUA, Sars. PL 28, fig. 50. 



Shell turriculated, with shouldered whorls, the shoulder acute 

 and tuberculated by the terminations of thirteen to sixteen nar- 

 row oblique ribs, having much wider interspaces which are 

 covered b} r revolving striae ; aperture rather short, broadly 

 truncate below. Length, 10 mill. 



Norway. 



B. TURRICULA, Montagu. PL 30, fig. 93 ; PL 27, fig. 22 ; PL 28, 

 figs. 41, 44, 45 ; PL 29, fig. 57 ; PL 33, fig. 60. 



Shell narro'v, turriculated, the shoulder acute, with the ribs 

 strongly projecting above it and then running across to the 

 sutures; ribs about sixteen, nearly straight, prominent, crossed 

 by very close, rather fine revolving striae ; aperture rather nar- 

 row ; canal narrow and produced. Length, 17 mill. 



Europe, Nova Zembla, Greenland. 



B. scalaris, Moller, B. scalaroides, Sars (PL 28, fig. 59), B. 

 Woodiana, Moller?, B. harpularia, var. rosea, Sars (PL 28, fig. 

 37), are synonyms of the typical form. B. Dowsoni and robusta 

 of S. Y. Wood are here referred by Dr. Jeffreys ; and among the 

 older names may be cited B. alba, Pennant, B. angularis, Donov., 

 and B. discrepans, Brown. B. nobilis, Moller (PL 28, fig. 41), 

 and its synonym B. angulata, Morch, designate a variety with 

 more strongly marked shoulder on the whorls. B. exarata, 

 Moller, and B. harpularia, Sars, not Couth. (PL 28, fig. 45), B. 

 rugulata, Sars (PL 33, fig. 60), B. assiwilis, Sars (PL 28, fig. 44), 

 and perhaps B. mitrula^Ltoven (PL 29, fig. 57), are synonyms. 



B. HARPULARIA, Couthouy. PL 29, fig. 51. 



Shell slightly round-shouldered, with 17-20 low oblique ribs 

 and fine revolving striae ; pale reddish brown or rosy, when fresh, 

 frequently yellowish or white. Length, 13-17 mill. 



Long Island Sound to Nova Scotia. 



This species is often confounded with the preceding one, but 

 differs in its obtusely rounded shoulder, lower and more numerous 



