148 Zoological Society : — 



slightly concave, vathcv produced at tlie iipper corner of the labial 

 side; smooth, but not shining. 



Height 0-0;33, greatest breadth O'OG, least breadth 0'043. 



Named in compliment to T. L. Taylor, Esq., the possessor of a 

 fine collection of shells. 



Petitia Stricklandiana, Chitty. 



JIab. Roaring Hiver, "Westmoreland. 



Form, globose-discoid. Colour, rich red-brown. Sculpture, lines 

 of growth apparent ; 38 inequidistant, irregvdarly raised, very fine 

 spiral carina? ; on the upper whorls 8. Spire, very little elevated, 

 with convex outlines. Whorls, Sfrds, well rounded, with a deep 

 suture. Ai^erture, widely dilated, not constricted, more dilated and 

 depressed below ; very slightly detached from body-whorl. Labrwn, 

 very widely double, moderately produced above, inner and outer 

 edge strongly pectinated' and scolloped by 6 points of the spiral 

 carinse. Lahium, very little detached from body-whorl, straight 

 above and abruptly curved below to the right ; much below the 

 plane of the labrum. Umbilicus, deep and rather broad. Labral 

 lamella, very little produced. Operculum, slightly concave, with 

 fine granulations in the hollow ; labral mai'gin with two sharp raised 

 lamellee round it ; a small narrow linguiform point overlapping the 

 labium at the lowest extremity on the labial side. 



Height 0-049, greatest breadth 0-074, least breadth 0-055. 



Named in compliment to H. E. Strickland, Esq., of Apperley 

 Court, Tewkesbury. 



Petitia Stokesiana, Chitty. 



Hab. ■ ? Hanover (unique). 



Form, globose-discoid. Co/our, pale horn. Sculpture, lines of 

 growth visible : 4 widely separated, rather strong, slightly raised, 

 rounded spiral carinas ; 1 finer ; 2nd to 7th strong, and 1 finer close 

 below ; 8th strong (the one at the periphery strongest and rather 

 sharp), and 2 very faint, round, and distant from the umbilicus ; on 

 the upper whorls 5. Spire, very little elevated, with rather concave 

 outlines. Ap)ex, somewhat mammiform. Whorls, 4, well rounded, 

 with a deep suture. Ap)erture, semicircular, altogether rather de- 

 pressed, very slightly constricted, not spreading, moderately detached 

 from penult whorl. Labrum, scarcely produced above, thickened, 

 slightly reflected ; smooth and white, not pectinated. Labium, well 

 detached from body-whorl, on a plane with labrum, almost straight 

 within the aperture, white, thickened and expanded towards the um- 

 bilicus, much so below, but most so and somewhat j)ointedly in its 

 centre. Umbilicus, broad and deep. Labral lamella, much ex- 

 panded at a distance from its junction with the labrum, becoming 

 very fine as it fades into the umbilicus. Operculum, ? 



Height 0-049, greatest breadth 0-08, least breadth 0-061. 



Named in compliment to Capt. Lort Stokes, R.N., late of H.M.S, 

 * Acheron,' a zealous collector. 



