177 



concave, smooth, with ? two strong rounded carinee vertically cross- 

 ing the hollow. 



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



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

 land. 



Genus III. Fadyenia, Chitty. 



Spire depressed, subangular on the upper part of the last whorl, 

 subplanulate at the periphery, subangulate below, and subpla- 

 nulate round the umbilicus. 



Fadyenia Fadyeniana. See Stoastotna 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) spiral carinse, wider apart below, 

 and more faiut round the umbilicus, and obsolete at the labrum ; 

 with a hiatus between the 1 3th 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, mammillated. 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 0-0G3. 



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

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



Note. — In F. Fadyeniana fine spiral carinse intervene the coarser, 

 and all are more distantly apart. 



Fadyenia Grayana, Chitty. 

 Hab. Yallahs Hill. 



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

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

 No.CCCXXXVIlI. — Proceedingsofthj: Zoological Society. 



