516 BULLION. 



by fine Hues of growth, and of a rather elongated subcy- 

 lindrieal figure, the length being in general to the breadth 

 as five is to two. Its surface is neither retusely indented 

 above, nor is it. swollen below (as in conulus) but is a little 

 planulatc in the middle, and thence tapers upwards so that 

 the shape is perceptibly attenuated at the posterior extre- 

 mity. The crown, which is rotundately peaked does not 

 exhibit any external volutions, and is either absolutely im- 

 perforated or barely exhibits a slight apical chink, as the 

 reflection of the inner lip wholly or partially covers the 

 umbilicus ; the periomphalos is solidified. The aperture, 

 Avhich is somewhat pear-shaped below, where the extremity 

 is a little patulous and broadly and very bluntly rounded, 

 is extremely narrow fi^r the greater portion of its extent, 

 and from the upper sweep of the outer lip, curves, and 

 recedes as it were, over the greater portion of the crown, 

 instead of almost perpendicularly projecting, as in the 

 allied species. The pillar lip is narrow, rather prominent, 

 only obscurely subpliciform, and not usually flanked by 

 any umbilical crevice : it is more or less straight, and 

 usually inclines to the left. Our largest example only 

 measures two lines in length, and about three-quarters of a 

 line in breadth. 



This rare species has as yet been observed only at 

 Croulin Island off Skye (Jeffi-eys) ; Loch Fyne (Barlee). 

 It was found by Loven on the coast of Sweden. 



