72 Zoological Societtj : — 



angulated on the upper part of tlie last whorl, then quasi straight 

 or flat at the periphery, and then subangulated again at the base. 

 Genus " Fadyenia," in memory of the lamented author of the 

 ' Flora of Jamaica.' 



Fourthly, those shells which represent the iS. pisum, the first 

 type, and are subglobose, Stoastoma. 



Fifthly, depressed conic shells, like S. Chittyanum, Genus 

 Metcalfeia ; S. Chittyanum being the only one described by 

 Adams. 



Sixthly, the globose, discoidal forms, such as Stoastoma Cumingi- 

 anum (that name being elsewhere preoccupied), I call Genus " Pe- 

 titia," as the second named by Adams, and in compliment to ^I. 

 Petit de la Saussaye. 



Seventhly, globose conic shells, like S. LindsJeyanum, I call 

 Genus "Lindsleya." 



And, eighthly, the subdiscoidal, like 5. Blandianum, I nominate 

 Genus "Blandia." 



STOASTO:\iID.E, Adams. 



Genus I. Lewisia, Chitty. 



Quasi double-mouthed . 



Lewisia Agassiziana, Chitty. See Stoastoma Affassizianum, 

 Ad. Cout. Conch, p. 158 ; Cat. Phan. p. 234. 



The habitat of this shell is near Ackendown, Westmoreland. The 

 " deposit," of which Adams speaks, is still remaining in one of my 

 specimens (the original type), and beyond a doubt is the operculum, 

 like many others I shall describe. It is so fixed in the aperture, 

 that I will not risk its breakage in removal, and so I cannot fully 

 describe it. It is excessively concave in its centre, continued on the 

 labial side in a long, broad, smooth, shining convex plate, shaped 

 like a tongue, and extending almost and sinking into the opposite 

 extreme of " the spiral lamella excessively developed and soldered," 

 &c., as described by Adams. 



Lewisia Philippiana, Chitty. See Stoastoma Philippianum, 

 Ad. Cont. Conch, p. 158; Cat. Phan. p. 235. 



Operculum, still ? 



Hab. Burnt Hill, near Ackendown, Westmoreland, nan Acken- 

 down. 



Lewisia Woodwardiana, Chitty. 



Hab. ? Hanover (unique). 



Form, subdiscoidal. Colour, very pale horn. Sculpture, 14 spiral 

 carinse, widely apart, rather blunt ; about 4 visible on the penult 

 whorl, lines of growth well defined. Spire, very slightly elevated, 

 with concave outlines. Tf^horls, 4, very slightly rounded, with a 

 lightly impressed suture ; last whorl well rounded. Aperture, well 

 detached fi'om the body-whorl, slightly depressed and slightly con- 

 stricted, semielliptical. Labrum, double, slightly thickened, reflected 



