some new andjpeculiar Mollusca. 323 



uppermost whorls are nearly smooth ; the base is irregularly- 

 marked with flexuous striae, these being an extension of the ribs; 

 the periphery of the last whorl is encircled by a spiral ridge, 

 which is continued on all the other whorls, and defines the 

 suture ; under a microscope may be detected also traces of 

 numerous slight spiral lines between the ribs : colour pale 

 yellowish-white : spire tapering ; apex twisted obliquely, and 

 extended: whorls 13-14, somewhat convex; the last occu- 

 pies about a third of the shell : suture distinct, but not deep : 

 mouth narrow and rhombic, with a wide groove at the bottom, 

 where it forms an imperfect canal, which bends abruptly to 

 the left : outer lip incurved and thin : inner lip filmy : pillar 

 short and flexuous, with a sharp edge. L. 0*4. B. O'l. 



Station 12, 1450 fms. ; a dead specimen. ' Lightning ' Ex- 

 pedition, between the north of Scotland and the Faroes ; a 

 fresh and living specimen, but the operculum is not visible. 



BuccinidsB. 



Buccinum groenlandicum, Chemnitz. 



Biiccinum grmnlandicum, Chemn. Concli. Cab. x. (1788) pp. 177, 182, 

 tab. 152. f. 1448. 



Body lemon-colour, more or less closely speckled and 

 mottled with purplish- brown: head short; intertentacular veil 

 indented in the middle : tentacles sharply pointed : eyes black, 

 seated on offsets or short tubercles, one at the outer base of 

 each tentacle : foot extensile, squarish in front, and bluntly 

 angular behind : siphonal tuhe long, cylindrical, and narrow : 

 opercular lobe round, with projecting edges. Active. 



Godhavn, 5-20 fms. ; Station 4, 20 fms. ; 5, 57 fms. ; Hol- 

 steinborg, 12 fms. Davis Strait (Fabricius and others). 

 Melville Bay, 140 fms. ; and Port Kennedy, 15 fms. (Walker). 

 Port Foulke, in Smith Channel or Sound (Hayes, fide 

 Stimpson). Gulf of St. Lawrence, 5-250 fms. (Principal 

 Dawson, Whiteaves ) ! Coasts of N.E. America (Gould and 

 others) ! Newfoundland (P. P. Carpenter) ! N. Pacific 

 (Middendorif and others). Spitzbergen (Torell) ! Iceland 

 (Morch). Norway (G. O. Sars and others) ! Russian Lap- 

 land (MiddendorfF) . Fossil in our Red Crag and newer Ter- 

 tiaries = ^. tenerum, J. Sowerby. 



Extremely variable in shape, size, texture, sculpture, and 

 colour. I regard the following as synonyms, or as repre- 

 senting some of the varieties : — B. undatum of Fabricius (not 

 of Linn^), B. undulatum of Moller, B. cyaneum of Beck, B. 

 Donovani oi Gould (not of Gray, which is B. glaciale of Linn^), 

 B. tenebrosum and JB. sericatum of A. Hancock ; apparently 



