328 Mr. A. Hancock on Shells dredged on 



that were brought one was so plaited in a slight degree. The 

 outer coat of the shell is generally eroded towards the apex. 



This species is probably related to the B. boreale of Leach, but 

 is undoubtedly distinct, for Mr. Gray states in the ' Appendix to 

 Becchey's Voyage/ that that species has much the habit of the 

 waved varieties of B. undatum, which is not the case with this 

 shell. The B. cyaneum of Beck appears to come much nearer, 

 though it also is probably distinct ; the B. undatum of Fabricius 

 being given as a synonym, and the description of it in the ' Fauna 

 Groenlandica ' differing widely from the specimens brought by 

 Messrs. Warham and Harrison : be this, however, as it may, 

 Beck's name cannot be retained, for it was pre-occupied by a very 

 different shell described by Chemnitz. 



y. Buccinum sericatum, n. s. PI. V. fig. 6. 



Shell ovate, ventricose, very thin, of a pale chestnut-colour, 

 irregularly varied with paler longitudinal belts ; sjpire not much 

 produced; whorls six, ventricose, somewhat abruptly rounded 

 behind, with fine spiral striae, and a few distant stronger ones 

 crossed by minute lines of growth, giving the surface a wrinkled 

 or shagreened appearance, visible only by the aid of a lens ; body- 

 whorl one-third longer than the spire; mouth roundish ovate, 

 one-half longer than the spire ; outer lip thin, sublobed in front ; 

 interior of a pale chestnut or fawn-colour ; columella smooth, pel- 

 lucid, short, glossy, much and regularly arched, the bend more 

 forward than usual ; epidermis of a greenish horn-colour with a 

 delicate silky gloss when held to the light, caused by the minute 

 cilia that clothe it, which through a lens are perceived to rise 

 from fine longitudinal laminae ; the cilia are regular and not much 

 crowded. Length 1 inch ; breadth {--J- inch. 



This is shorter and more ventricose than any of the preceding 

 species, and is very delicate and horn-like. It differs from B. te- 

 nebrosum as well in size and colour as in having the mouth much 

 longer in proportion to the spire : the whorls are also somewhat 

 abruptly rounded above, which is not the case in that species ; 

 and the columella has the gloss spread further over, is quite 

 smooth, and in some specimens is so transparent that the pillar 

 can be seen through it ; the bend also is simple and rather lower 

 down ; the surface of the shell is more strongly marked by the 

 striae, and the strong spiral ridges or keels are wanting. 



Buccinum cyaneum, Chemnitz. 

 Buccinum cyaneum, Chemn. Conch, vol. x. p. 182. tab. 152. 

 f. 1448. 



A single specimen was dredged ; it is quite young (measuring 

 ven-eighths of an inch in length), but agrees pretty well in ge- 



