464 CONID^. 



fissure is not very broad at its opening-, but is peculiarly 

 long, the breadth continuing to be almost the same 

 throughout. The inflection of the lip at the commence- 

 ment ot" the canal is very slight. The columella, which 

 is smooth, white, and moderately rounded, is tolerably 

 straight, but leans a little to the left at its extremity. The 

 length of the very fine example we have figured (from 

 Mr. Jeffreys' incomparable collection) is three-fifths of an 

 inch, and its breadth nearly three lines. The nucleus is a 

 most beautiful object beneath the microscope, appearing to 

 be fretted with a most delicate network of raised lines. 



The animal is entirely white. The tentacula are long 

 and subulate : the eyes are placed on very short bulgings 

 at about a fourth of their length from their bases. The 

 foot is very large, wide and expanded, truncated, and 

 strongly auriculated in front, subtriangular behind. There 

 is not a vestige of an operculum. The siphon is ex- 

 tended beyond the shell, as in others of its genus. 



Althougli a very recent addition to the British Fauna, 

 of which it was first announced as a member by Mr. M'An- 

 drew, it has of late been taken in many localities, and at 

 various depths from fifteen to one hundred fathoms. On 

 the Cornish coast (where it has been found by Mr. Cocks, 

 and Mr. Peach) it has been dredged in fifty fathoms ; and 

 on the Zetland seas frequently between thirty-five and one 

 hundred fathoms (M' Andrew and E. F.). Off Nor- 

 thumberland it has been taken in seventeen fathoms 

 (Howse) ; in fifteen and eighty fathoms, Orkneys (Thomas); 

 in Loch Fyne, also on the coast of Gal way in Ireland 

 (Barlee). It ranges through the Mediterranean, 



