220 PYRAMIDELLID^. 



outer lip is simple, but not thin, juts out rather abruptly 

 above, does not expand, and is not sinuated in outline. 

 The pillar-lip is moderately broad, reflected, but not closely 

 appressed, is long, smooth (as is likewise the throat) and not 

 much curved. The peristome is scarcely continuous, but 

 no angle is formed by the pillar (as in TurriteUa) with the 

 base of the penult turn. There is no distinct umbilicus, but 

 at most a chink. The specimen we have chiefly described 

 from does not exceed the seventh of an inch in length. 



All we know of the animal is contained in the generic 

 character, cited by Loven. 



Turton first took it at Seafield in Ireland ; it has 

 since been taken in that country by Mr. Warren and 

 Mr. Alder on the east coast, and by Mrs. Hancock at 

 Bundoran on the west (W, Thompson) ; Burrow Island 

 (Rev. J. M. Beevor) ; Tenby (Jeffreys). In eighty- two 

 fathoms, on sand, east of Zetland (M'Andrew). Some of 

 these localities may belong to the succeeding shell, Avhose 

 identity with the present will probably hereafter be deter- 

 mined by the discovery of intermediate examples. 



A. SUPRANITIDA, S. Wood. 



Turrcted-subcoiiical, smaller whorls, spirally ridged ; lower 

 turns eitlier wliolly smooth, or smooth upon the upper tliird of 

 each ; mouth rounded oval ; axis widely umbilicated in the 

 adult. 



Plate XC. f. 2, 3. 



Alvania supranitida, Seari.es Wood, Catal. Crag Moll. 



„ ascaris, Searles Wood, Crag Moll. p. 9!), pi. 12, f. II. 



We are indebted to the late Mr. Lyons of Tenby, for 

 the gift of some examples of this remarkable species, which 



