188 



Whorls, 3f rds, moderately rounded, with a deep suture. Aperture, 

 semicircular, rather constricted behind the lab rum, not expanded, 

 very slightly detached from the body-whorl. Labrum, not produced 

 above, smooth, rather double, inner edge sharp, the strongest lines 

 terminating abruptly at the outer edge. Labium, very slightly 

 curved to the right below, well detached from the body-whorl, lower 

 than the plane of the labrum below. Umbilicus, very shallow and 

 broad, much covered by the labral lamella, which is much and widely 

 produced above. Operculum, ? 



Height 0-038, greatest breadth 0*07, least breadth 0*054. 



Named in compliment to P. P. Carpenter, Esq., of Warrington, 

 author of an excellent Catalogue of the Mazatlan Shells in the British 

 Museum. 



Petitia (? Lewisia) Barroniana, Chitty. 



Hab. 1 (unique). 



Form, globose-discoidal. Colour, 1 Sculpture, 20 spiral 



carinee, 7 of which are rather more prominent, namely the 2nd, 4th, 

 8th, 12th, 16th, 18th and 19th : on the upper whorls, 6. Striae of 

 growth visible. Spire, much depressed, with straight outlines. 

 Whorls, 4, moderately rounded, with a light suture. Aperture, much 

 constricted at the labrum, semicircular, widely separated from the 

 body-whorl. Labrum, not produced above, simple, thin, rather 

 double, slightly and coarsely pectinated on the inner edge, much 

 thickened and slightly reflected. Labium, much reflected, mode- 

 rately curved below, on a plane with the labrum above, lower below. 

 Umbilicus, moderately deep, very broad, much concealed by the 

 labral lamella, which spreads enormously and suddenly above, ex- 

 teriorly convex (? Lewisia). Operculum, very deeply concave in the 

 centre, finely granulated, upper margin broad, and indented on the 

 labral side, and enormously spread convexly over the lower end of 

 the labium ; almost equal to the spread of the labral lamella, deeply 

 grooved at the lower end, terminating in a linguiform projection. 



Height 0-048, greatest breadth 0-084, least breadth 0-065. 



Named in compliment to Charles Barron, Esq., Curator of the 

 Royal Naval Museum, Haslar. 



Genus VII. Lindsleya. 



Shell, globose-conic. 



Lindsleya Lindsleyana, Chitty. See Stoastoma Lindsley- 

 anum, Adams. Mon. Stoas. Ad. 1849, p. 12; Cat. Phan. p. 229. 



Hab. Manchester back-woods. 



Lindsleya Pickeringiana, Chitty. 



Hab. ?, ? Manchester, ? Yallahs Hill. 



Form, globose-conic. Colour, very pale horn. Sculpture, 17 

 strong blunted rounded spiral carinse, within each interspace one or 

 rarely two very fine carinse : on the upper whorls 5, with a fine one 



