482 cONiD^. 



and not at all expaiuleil. The posterior sinus, tliongh 

 rounded and rather shallow, is still perceptible in the 

 finer examples. The pillar, which bends slightly to the 

 left, and is not apparently marked with any sculpture, 

 occupies more than one half of tlie inner lip, on which 

 latter the enamel is but thinly diffused.* 



The largest specimen we have seen did not measure 

 much more than a quarter of an inch, with a breadth of 

 only a line and a half. 



We have figured the animal from a living example 

 taken off" Skye. It was white, speckled with opaque pur- 

 plish-white flakes. The head is rather small, with very 

 short, thick, obtuse and clavate tentacula, bearing very 

 large eyes on bulgings rather more than half way towards 

 their tips. The peduncle of the foot is long and narrow ; 

 the foot itself as long as the shell, lanceolate, tapering 

 behind, but truncate and emarginate at the extremity of 

 the tail, obtusely angulated and bilobed in front. There 

 is no trace of an operculum. The creature was very 

 active. 



This is a rare shell, yet probably widely distributed. 

 On the English coast it has been taken in fifty fathoms off 

 Cornwall (M 'Andrew) ; at Torbay (Battersby) ; Exmouth 

 (Clark) ; Whitburn, Northumberland (Alder) ; in various 

 localities in the Hebrides and Zetlands (Barlee) ; where 

 we have met with it in depths ranging from ten to sixty 

 fathoms on muddy and gravelly bottoms (M'Andrew and 

 E. F.). In Ireland it has been taken in Cork harbour 

 (Humphreys) ; and Bantry Bay (Barlee). It ranges from 

 Sweden to the Mediterranean, and is a coralline crag 

 fossil . 



* The P. Forhcni of Reeve (Conch. Icon. vol. i. Pleur. pi. 37, f. .33.0) has 

 much the aspect of this species. 



