338 NATICIDiE, 



than two-fifths of mi inch in length, and rather less in 

 breadth. 



The animal is of a white or yellowish-white hue, excci)t 

 the upper and lateral margins of the reflexed lobe of the 

 mentum, which are bordered by a defined and conspicuous 

 line of some breadth, of a claret brown colour. The 

 lobe itself has a tendency to emargination in the centre, 

 and to angularity at the sides. The sole of the foot 

 is white. The tentacula are lanceolate, acute at their 

 tips, and entirely white. The operculum is corneous. 

 Our figure of the animal is from a drawing by Mr. 

 Alder. 



This pretty species ranges from Cornwall to Zetland, 

 but can be said to be common only in the North. Mr. 

 Peach has found it once at Govan. We have taken it in 

 thirty to thirty-five fathoms, sand, on the Devon coast, 

 and Mr. M'Andrew has dredged it in fifty fathoms, sand, 

 off Cornwall. In the southern part of the Irish Sea it is 

 very rare, but becomes frequent on the north coast of the 

 Isle of Man (E. F.). It is sufficiently common in the 

 Scottish seas, living on a bottom of sand, gravelly sand, or 

 gravel, in from twelve or fifteen to eighty or ninety fathoms 

 water, as to render an enumeration of its localities super- 

 fluous. It is not quite so common along the eastern coast 

 of Britain, but seems generally distributed. Lieut. Thomas 

 observes that it is a decidedly deep water species there, 

 and located upon stony ground. On the Irish coast it has 

 been taken in forty-eight fathoms, off Cape Clear, by Mr. 

 M'Andrew; in the stomachs of gurnards, in Cork harbour, 

 by Mr. Humphreys (Jeffreys) ; on the Galway coast by 

 Mr. Barlee ; and in Belfast Bay, in twenty fathoms, by 

 Mr. Hyndman, and Mr. Getty (Thompson). 



Professor Loven records it as ranging- as far north as 



