NEOBUCCINUM. VOLUTHARPA. 197 



B. CANALICULATA, Ball. 



Shell solid, livid white, covered with a strong, dark brown 

 pilose epidermis; whorls moderately rounded; suture deeply 

 channelled; surface of the whorls covered with fine, spiral, 

 thread-like ridges, with still finer ones intervening between them, 

 lightly decussated by the fine but distinct lines of growth, to 

 which the epidermis especially adheres ; the coarser ridges are 

 about seven in number, between the posterior end of the aperture 

 and the edge of the suture behind it. Whorls five and a half, 

 aperture half as long as the shell ; internally polished ; outer 

 edge somewhat thickened ; inner lip callous; columella strongly 

 twisted ; canal short, rather wide. 



Length 1-33 inches, diam. -75 inch. 



Cape Expenherij, Alaska. (One specimen, on the beach.) 



Much less inflated and proportionally longer than B. Dalei, 

 which is nearly smooth and has not the channelled suture. I am 

 not acquainted with this species. 



<Jenus NEOBUCCINUM, E. A. S urth. 

 N. EATONI, E. A. Smith. PI. 77, figs. 357, 358. 



Pallid brown ; shell thin and smooth. Length, 56 mill. 



Kerguelen Island, 3-7 fathoms. 



Animal (in spirit) uniform buff color; foot broad in front and 

 somewhat truncated, narrowed posteriorly; head of moderate 

 size, furnished with two rather short tentacles not adjacent at 

 their base ; e} r es situated on prominences on the outer side of 

 the tentacles towards their bases ; proboscis very long ; siphonal 

 expansion of the mantle thick, of medium length. 



Lingual ribbon very long ; rachidiari tooth tricuspidate, uncini 

 tricuspidate also, prongs hooked, outer one the largest, the inner 

 rather smaller, the median very much smaller still and close to 

 the latter. 



The preceding, genera, liuvcinum and B >"(/ /><>/>^s. are in- 

 habitants of the Arctic sea ; this, of the Antarctic waters, 



Genus VOLUTHARPA, Fischer. 



This little group of mollusks is confined in distribution to the 

 North Pacific Ocean, its metropolis being Japan. Three of the 

 species were originally described as Bullia, from which genus it 



