ACLIS. 101 



glossy: sculpture, numerous delicate and flexuous longitu- 

 dinal ribs, crossed by as many fine spiral ridges or striaB, and 

 producing by their mutual intersection an exquisitely reticu- 

 lated appearance ; the ribs are usually stronger on the upper 

 whorls ; apex smooth and polished : colour white, with a faint 

 tinge of yellowish-brown in live or fresh specimens : spire 

 elegantly tapering to a blunt point, which when viewed side- 

 ways appears button-shaped, and projects a little beyond the 

 succeeding part of the spire : if viewed from above it appears 

 slightly inflected : whorls 9-10, moderately convex, and gra- 

 dually increasing ; the first whorl and half of the next form 

 the apex of the spire : suture deep, rather oblique : mouth 

 exactly oval, effuse below : outer lip slightly flexuous, incurved 

 above : inner lip thin, adhering to the pillar, connected with 

 the outer lip at the upper corner ; there is no umbilicus, but 

 the base is narrowly depressed behind the pillar [: operculum 

 " light vellow and suboval, with distinct grossly spiral turns ' 

 (Clark)]. L. 0-115. B. 0-02. 



Habitat : Local in the littoral zone. I will enu- 

 merate some of the places where this species lias been 

 noticed : — Haroldswick Bay in Unst (Dawson) ; Moray 

 Firth (Murray, fide Gordon) ; Hebrides (J. G. J.) ; 

 Dunbar (Bingham, fide Brown) ; Lamias h (Lands- 

 borough); Northumberland and Durham (Alder) ; Scar- 

 borough (Bean and J. G. J.) ; Dublin Bay (Turton) ; 

 Cork (J. G. J.); Sandwich (Walker and J. G. J.); Bar- 

 mouth, Tenby, and coast of Gower (J. G. J.); Cornwall 

 and Devon (Montagu and others) ; Guernsey (Barlee 

 and J. G. J.) . Mr. Clark found the living specimen 

 from which his description was taken in Littleham 

 cove near Exmouth, at low-water mark, on the margin 

 of a deep and quiet rock-pool, among debris of small 

 decayed shells mixed with sand and mud that had an 

 offensive odour. Loire-Inferieure (Cailliaud) ; Spezzia 

 (J. G. J.) . 



" This creature is not at all shy ; it remained lively 

 for thirty-six hours, and gave every facility for good ex- 



