TORNATELLA. 525 



and beneath a powerful lens appear clotted or crossed 

 lengthways by minute raised lines. The spire, which is 

 rather quickly attenuated to a very acute and symmetri- 

 cally coiled apex, is composed of seven convex or some- 

 what rounded short volutions, that are of moderate longi- 

 tudinal increase, and taper regularly above, where they 

 bend over the fine but canaliculated suture that divides 

 them from each other. The body, which is more or less 

 ventricose, and instead of being cylindrical is swollen to- 

 wards the middle, is convex in surface, and has both 

 declinations more or less rounded. The mouth occupies 

 two-thirds of the total length, and is curved, and somewhat 

 horn-shaped ; it is very acutely peaked above, and widening 

 gradually, is most dilated nearly oj)posite to (but slightly 

 above) the columellar fold ; the lower end is prominent, a 

 little patulous, and rather narrowly rounded. The throat, 

 which faintly exhibits the external colouring, is quite 

 smooth. The acute and simple outer lip is moderately 

 but uninterruptedly arcuated, and recedes but little an- 

 teriorly. The pillar lip, which is white, broadly reflected, 

 not quite appressed, and a little convex in surface, is 

 furnished with a large and prominent fold, which is seated 

 so high up, that the incurved portion of the columella 

 below it is rather produced. The breadth in one of our 

 larger examples, which was five-sixths of an inch long, was 

 nearly five lines. 



The animal, the form of whose parts is as described in 

 the generic character, is of a milky white hue. When 

 walking, it bears its capital lobe partly in advance of the 

 foot. It is active, and by no means shy, not retracting its 

 body when overturned. When handled it gives out a 

 milky fluid with a purplish tinge. The operculum is large 

 and sufficieutly conspicuous. 



