I50 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vol. 50 



keel at its hinder edge. Lon. of shell, 40; of last whorl, 26; of aper- 

 ture, 18; maximum diameter, 17 mm. 



Station 4808, off Hakodate, Japan, in 47 fathoms. U. S. Nat. 

 Mus., 110,532. 



The shell has somewhat the form of a large Lymncca and is hardly 

 more substantial. It belongs to the group of B. picturatum Dall. 



BUCCINUM SIMULATUM Dall, n. sp. 



Shell resembling the last in minor sculpture, but with six or seven 

 obscure ribs on the penultimate whorl, hardly reaching the periphery, 

 three strong spirals on the whorls, the last just above the suture 

 and the fasciculi of the spire elevated until they resemble striated 

 threads ; color pale livid brown, without color-bands ; whorls eight ; 

 outer lip thin, slightly expanded, and in front thickened with a 

 white border ; throat brownish ; body and pillar glossy, not callous ; 

 canal short, wide, recurved, with a strong fasciole with a groove 

 behind it, but no keel. Lon. of shell, 38 ; of last whorl, 25 ; of aper- 

 ture, 17; maximum diameter, 17 mm. 



Station 4779, in 54 fathoms, on the Petrel Bank, Bering Sea, June 

 9, 1906. U. S. Nat. Mus., 110,533. 



BUCCINUM BULIMULOIDEUM Dall, n. sp. 



Shell small, very thin, with a thin periostracum of a straw-yellow 

 color, distinct suture, subacute spire, and about six whorls ; surface 

 apparently smooth, but under the lens showing fine uniform micro- 

 scopic spiral striation, not fasciculated, but more or less undulate ; 

 aperture white, outer lip slightly expanded and thickened ; a thin 

 wash of callus on the body ; pillar short, twisted, not pervious ; canal 

 short, wide, deep, forming a marked fasciole with no keel behind it ; 

 when fresh, the periostracum, rising on the incremental lines in 

 microscopic elevated lines, reticulates the sculpture, but this is lost 

 with wear. Lon. of shell about 34 ; of last whorl, 25 ; of aperture, 

 16.5 mm.; maximum diameter, 15 mm. 



Station 2853, in 159 fathoms, sand, southeast of Alaska Peninsula. 

 U. S. Nat. Mus., 110,534. 



This has very much the aspect of a Biiliimtliis, with the exception 

 of the canal. 



BUCCINUM ROSSICUM Dall, n. sp. 



Shell large, solid, short-conic, with about six whorls, white, clothed 

 with a dense, thick, reticulated pubescent periostracum of an 

 olivaceous tint ; whorls rapidly increasing, with an elevated, small, 

 spiral ridge forming a wide, shallow channel in front of the suture, 



