177 



concave, smooth, with ? two strong rounded carlnse vertically Cross- 

 ing the hollovr. 



Height 0-035, greatest breadth 0-058. least breadth 0-042. 



Named in compliment to Prof. A. H, Mousson of Zurich, Switzer- 

 laud. 



Genus III. Fadyenia, Chitty. 



Sj)ire depressed, subangular on the vpper part of the lašt whorl, 

 subplanulate at the periphery, subangulate below, and subpla- 

 nulate round the umbilicus. 



Fadyenia Fadyeniana. See Stoastoma Fadyenianum, Ad. 

 Mon. Stoast. Adams, 1849, p. 7 ; Cat. Phan. p. 231. 



Hab. Hills S.W. of Port Henderson. 



Other shells, I have reason to know, have been distributed for 

 this. 



Fadyenia Bowerbankiana, Chitty. 



Hab, Roaring River, Westmoreland. 



Form, subdiscoidal. Colour, very pale tinge of brown. Sculp- 

 ture, 24 strong equidistant (above) spirai carinse, wider apart below, 

 and more faint round the umbilicus, and obsolete at the labrura ; 

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

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

 much depressed with concave outlines. Apex, mammillated. JVhorls, 

 4, well rounded above, with a deep suture ; lašt v^horl 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 belovv, so that the subplanulate periphery is nearly 

 at right angles -ttith the outline of the spire. It is the šame 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 v?ith 

 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 belovir than 

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

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

 upwards tovvards the umbilicus. Opereulum ? 



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



Named in compliment to my friend and fellovF-labourer in science, 

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



Note. — In F. Fadyeniana fine spirai carinee iutervene the coarser, 

 and all are more distantly apart. 



Fadyenia Grayana, Chitty. 

 Eab. Yallahs Hill. 



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

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

 No.CCCXXXVIII. — Proceedingsofthe Zoological Society. 



