EULIMA. 231 



An abbreviated variety is taken in the North, which 

 differs from the more characteristic individuals, in the 

 greater rapidity with which the shape widens, and the 

 consequently less cylindraceous shape of the body-whorls, 

 and greater abruptness of the basal declination. The 

 suture is rather more indistinct. 



Notwithstanding the very diff"erent look of the more 

 strikingly dissimilar Loch Fyne specimens, that are usually 

 termed nitida by collectors, and which somewhat re- 

 semble the shell so named by Philippi (Moll. Sicil. vol. i. 

 pi. 9, f. 17), but not the original figure in the " Annales 

 du Musee " (vol. viii. pi. 60, f. 6), which is very much more 

 slender, we are unable to discern any absolutely permanent 

 characters of sufficient importance to authorize their sepa- 

 ration from poUfa. They are generally, however, more 

 regularly subulate (yet variable as to relative length and 

 breadth), as the body is rather less cylindraceous. The 

 suture, besides, is more horizontal, and more clearly pro- 

 nounced, the whorls, especially the final one, more disposed 

 to convexity, and the outer lip more symmetrically arcuated. 



The animal has a rather narrow head, flanked by two 

 subulate tentacula with approximated bases, upon which 

 are borne the conspicuous sessile eyes, a little to their 

 outer sides ; on one side of the neck in the males is a 

 small, slightly falcate, flattened process. The mantle is 

 even-edged, and opposite to that part of the lip of the 

 aperture of the shell which corresponds to the canal in 

 the siphonated univalves, it is slightly produced and formed 

 in a very rudimentary respiratory fold. The foot is long 

 and much produced in advance of the head, and margined 

 by a bilobed mentum or frontal fold ; it is angulated, but 

 not acutely, in front, and obtusely pointed behind. The 

 sides bear two unequally developed, rather obscure lateral 



