178 



spirai carinse, of which 8 or 9 are visible on the upper whorIs. 

 Spire, much depressed, less than in F. Boioerbankiana, with concave 

 outlines. Aj)ex, mammillated. JVhorls, 4frds, with a moderate 

 suture ; lašt whorl typical, subangulated and subplauulated as in F. 

 Bowerbankiana and F. Fadyeniana. Aperture, semicircular, only 

 slightly affected by the subangularity above and below tbe periphery, 

 very sligbtly dilated. Labrum, double ; outer edge pectinated by 

 tbe spirai carinse, inner edge simple, wliite and shining. Labium, 

 white, thickened and reflected towards tbe umbilicus about its centre, 

 below much curved to the right, much lower than the plane of the 

 labrum at its lo\ver end ; widely separated from the body-whorl. 

 Umbilicus, rery deep and narrow. Labral lamella very broadly and 

 sharply produced throughout ; besides the labral lamella within the 

 umbihcus, extending from the back of the labium to the umbilicus 

 and body-whorl, are four or five weU-produced distiuct sharp lamellse. 

 Operculum, deep concave in the centre, and a broad margiu all round, 

 which, on that side, folds well over the labrum, especially below; 

 much covered by numerous coarse granulations, and in the hollow 

 on the labral side \vith four or mere strong raised lamellse, which are 

 also covered with coarse granulations. 



Height 0-076, greatest breadtb 0-105, least breadth 0-087. 



Named in compliment to Dr. J. E. Gray, Britisb Museura. 



Genus IV. Stoastoma, Adams. 



Shell subfflobose. 



Stoastoma pistjm, Ad. See Mon. Stoast. Adams, 1849, p. 11 ; 

 Cat. Phan. p. 228. 



Sculpture, almost obsolete, Tcry numerous raised spirai microscopic 

 cariuse, vvhich are well defined on the upper whorls, four or five 

 being visible. Labrum, double. Labium, well detached from the 

 peuult whorl. Operculum, concave and finely granulated in its con- 

 cavity. 



Hab. Manchester, generally, and near Accompong Town, St. Eli- 

 zabeth. — Chitty, 



Stoastoma Pfeifferianum, Ad. See Mon. Stoast. Adams, p. 8; 

 Cat. Phan. p. 230. 



Labrum, double. Operculum, concave, finely granulated in its 

 concavity ; margiu sharp on the labral side, rather broad, but not 

 thickened on the labial side. 



Hab. Manchester back \voods. — Chitty. 



Stoastoma Livesayanum, Chitty. 



Hab. Near Ashley Hali, Trelavvny. 



Form, subglobose. Colour, pale yellow. Sculpture, 1 1 distant, 

 blimt and raised spirai carinae, of vvhich 5 are visible on the upper 

 \vhorls. Spi)-e, conic, moderately elevated, with slightly convex out- 



