194 CERITHIAD.'E. 



the lip. The whorls are of slow increase, rather short 

 than otherwise, and are simply and but moderately convex, 

 not being partially swollen or excavated as in certain of 

 the genus. The suture, though not very broad, is well 

 marked : the apex is very acute. The mouth, which does 

 not occupy a fourth of the entire length, is small, but 

 little expanded, of an oval shape, scarcely angulnted above, 

 and rounded below, where it terminates in a slight canal, 

 that is neither produced nor reflected, but leans away 

 from the outer lip. This last is convex, simple, acute, 

 and entire ; not being either lobed or sinuated. The 

 throat is plain, and of the external colouring. The pillar- 

 lip has neither pad nor fold, is shining, moderately in- 

 curved, and usually tinged with livid purple. Five lines 

 and a half in length, and nearly one and a half in breadth, 

 were the dimensions of a fair-sized example. 



The animal, of which, besides our owji notes, we have 

 been favoured with a drawing by Mr. Alder, and fresh 

 observations by Mr. Clark, is rather short as compared 

 with the shell ; it is of a yellowish- white hue, with dusky 

 markings. Its muzzle is long, rather broad, and vertically 

 cloven at the end, as well as the head and neck dusky and 

 marked with black and brown transverse lines. The 

 tentacles are cylindrical, not remarkably long, or pointed, 

 always exceeding in length the snout, though not greatly, 

 yellowish, speckled with dusky and opaque yellow, in some 

 instances marked with two fine dark-brown lateral lines; the 

 eyes are borne on rather prominent pale bulgings at their 

 external bases. The foot is obtusely triangular, and is 

 gently auricled in front. According to Loven, the oper- 

 culigerous lobe has rudimentary expansions on each side, 

 and is furnished with a roundish lanceolate cirrhus. We 

 have not seen this in the adult. Mr. Clark has, however, 



