The Hon. E. Chitty on the Stoastomidse. 139 



Fadyenia Bowerbankiana, Chitty. 



Hah. Roaring River, Westmoreland. 



Fovniy subdiscoidal. Colour ^ very pale tinge of brown. Sculp- 

 turcy 24 strong equidistant (above) spiral carinae, wider apart below, 

 more faint romid the umbilicus, and obsolete at the labrum ; with 

 a hiatus between the 13th and 14th, equal to the space occupied 

 by 3 carinse, at the periphery ; 7 visible on the upper whorls. Spire, 

 much depressed with concave outlines. Apex, mamillated. Whorls, 

 4, well rounded above, with a deep suture ; last whorl rather large 

 and expanded; subangular at the upper part, subplanulate at the 

 periphery, and subangular below, subplanulate, but more convex 

 round the umbilicus than in F. Fadyeniana ; the whorl is much 

 wider above than below, so that the subplanulate periphery is nearly 

 at right angles with the outline of the spire. It is the same in F. 

 Fadyeniana. Aperture, very slightly constricted above behind the 

 labrum ; dilated, large ; rather more constricted below, behind, and 

 at the labrum ; upper third flattened almost at a right angle with 

 the labium ; well rounded below. Labrum, simple, white. Labium, 

 on a plane with the labrum, well detached from the body-whorl ; 

 thickened and reflected towards|the umbilicus, more so below than 

 above ; much rounded to the right below. Umbilicus, rather deep. 

 Labral lamella, well defined, strong and prominent, and inflected 

 upwards towards the umbilicus. Operculum ? 



Height 0-041, greatest breadth 0*08, least breadth 0*063. 



Named in compliment to my friend and fellow-labourer in science. 

 Dr. L. Q. Bowerbank, M.D., of Kingston, Jamaica. 



Note. — In JP. Fadyeniana fine spiral carinse intervene between the 

 coarser, and all are more distantly apart. 



Fadyenia Grayana, Chitty. 



Bab. Yallahs Hill. 



Fortn, subdiscoidal. Colour, rich light brown. Sculpture, about 

 33 irregular and inequidistant, some fine and some rather strong, 

 spiral carinse, of which 8 or 9 are visible on the upper whorls. 

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

 outlines. Aj)ex, mamillated. Whorls, 4frds, with a moderate 

 suture ; last whorl typical, subangulated and subplanulated as in F. 

 Bowerbankiana and F. Fadyeniana. Aperture, semicircular, only 

 slightly afl'ected by the subangularity above and below the periphery, 

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

 the spiral carinse, inner edge simple, white and shining. Labium, 

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

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

 labrum at its lower end ; widely separated from the body-whorl. 

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

 sharply produced throughout ; besides the labral lamella within the 

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

 and body- whorl, are four or five well-produced distinct sharp lamellaB. 

 Q^erculum^ deeply conpave in the centre, with « broa^ margin all 



