68 LUCINID^. 



foot in the centre of the ventral range ; no siphonal process 

 is to be found ; not even an orifice, except the pedal one, 

 could be detected. The branchial must of course be sup- 

 plied from the large aperture of the foot. The body is very 

 small, pale-brown ; the liver is suborbicular, granulose, and 

 black-brown ; the rectum runs through the liver. There 

 are two subquadrangular branchise, and two palpi, on each 

 side the body ; the former are finely pectinated, and smooth 

 on the under-surface ; the jialpi are moderately long, sub- 

 triangular, pointed, and striated on one side ; both are of 

 a good brown colour. The foot is clear white, moderately 

 long, flattish, and completely lanceolate laterally, and at 

 the point." 



This is by no means a common British shell, and it is 

 confined to the southern shores, ranging up the Irish sea as 

 far as Anglesea. It inhabits sand. As localities, we may 

 enumerate, Poole in Dorset, where it was observed by 

 Montagu; Exmouth (Clark) ; Fowey, in Cornwall (Alder); 

 Falmouth (Montagu, Cocks). Plymouth, dredged dead 

 in twenty fathoms ; Penzance in twelve fathoms ; Anglesea 

 in the same depth of water, and oiF Lundy Island in from 

 seven to twenty- five fathoms (McAndrew^ and E. F). 

 Tenby (Lyons). On the Irish coast it occurs at Youghal 

 (R. Ball), and Bantry Bay (JeiFreys). 



It ranges to the Mediterranean. As a fossil it occurs in 

 both red and coralline crags, and was one of the mollusks 

 which retired to southern latitudes during the glacial epoch, 

 and afterwards returned. 



