176 



concave outlines. Whorls, 3^, well rounded with light suture. 

 Aperture, much constricted behind the labrum, and then much di- 

 lated ; depressed above and expanding below ; subsemicircular. La- 

 brum, double, slightly produced above ; pectinated and slightly scol- 

 loped by the five stronger carinse ; attached to the body-whorl and 

 produced at an angle of about 70° ; slightly thickened and reflected. 

 Labium, much lower than the plane of the labrum above ; less so, 

 below, moderately detached from the body-whorl ; rather curved at 

 both extremities. Umbilicus, shallow and broad, not affected by the 

 labral lamella, which is fine and narrow throughout. Operculum ? 



Height 0-041, greatest breadth 0-061, least breadth 0-047. 



Named in compliment to Sylvanus Hanley, Esq., author of * Bri- 

 tish Shells,' &c. 



Wilkinson^ea Bensoniana, Chitty. 



Hab. K-oaring River, "Westmoreland. 



Form, subdiscoidal. Colour, rather dark brown. Sculpture, six 

 prominent sharp spiral carinse intermingled with eighteen less strong : 

 on the upper whorls, one strong between about six less strong. 

 Spire, very little elevated, with slightly concave outlines. Whorls, 

 3^, slightly rounded with a very light suture. Aperture, semicir- 

 cular, depressed above in the uppermost third, much expanded 

 below. Labrum, much and pointedly produced above, at an angle 

 of about 75° from the body- whorl, white, slightly thickened and re- 

 flected, angulated, not pectinated, by all five points of the sharper 

 carinse. Labium, rather curved below, much detached from body- 

 whorl, on a plane with the labrum at the lower end, much below it 

 above. Umbilicus, rather deep and broad. Labral lamella, regu- 

 larly produced, strong but narrow, subangularly pointed close at the 

 labrum. Operculum, moderately concave, serpentine on the labial 

 side, with a groove on the labral side. 



Height 0-027, greatest breadth 0-049, least breadth 0-038. 



Named in compliment to W. H. Benson, Esq., who has contri- 

 buted so much to our Indian land-shells. 



WilkinsoNjEA Moussoniana, Chitty. 



Hab. Yallahs Hill. 



Form, subdiscoidal. Colour, white, semitransparent. Sculpture, 

 22 lines, four of which are very slightly stronger than the rest, 

 lowest most strong and prominent ; on the upper whorls, 7. Spire, 

 slightly elevated, with convex outlines. Whorls, Z\, slightly rounded, 

 with a light suture. Aperture, slightly expanded and depressed 

 below, more than a semicircle. Labrum, thickened and reflected, 

 double above, very slightly scolloped by the four stronger carinse, or 

 rather the labrum is produced in straight lines to meet each stronger 

 carina, forming three straight lines scarcely pectinated, in octagonal 

 shape, moderately and roundly produced above from the body-whorl. 

 Labium, rather curved, below the plane of the labrum above, mode- 

 rately detached from the body whorl. Umbilicus, deep. Labral 

 lamella, sharply, finely and uniformly produced. Operculum, slightly 



