186 



side ; throughout the labial side overlapping the labium with sharp, 

 fine, numerous raised lamellae on the labral side. 



Height 0-062, greatest breadth 0-09, least breadth 0-077. 



Var. a. 



From near " Water Wheel." 



Height 0-044, greatest breadth 0*076, least breadth 0-061. 

 Named in honour to the memory of the late Professor C. B. 

 Adams of America, my friend and conchological master. 



Petitia Tayloriana, Chitty. 



Hub. ? St. Ann's. 



Form, globose-discoid. Colour, pale horn. Sculpture, 24 fine, 

 sharp, inequidistant, spiral carinse, 6 of which interspersed are rather 

 strong ; on the upper whorls 5. Spire, very slightly elevated, with 

 convex outlines. Whorls, 4, slightly rounded, with a light suture. 

 Aperture, very slightly constricted behind the labrum, and slightly 

 expanding ; scarcely detached from the body- whorl ; slightly de- 

 pressed above and expanded below. Labrum, white, shortly reflected, 

 not produced above, very little pectinated by the stronger spiral 

 carinse ; slightly double below. Labium, on a plane with labrum, 

 straight, appressed above to the body-whorl. Umbilicus, ratber 

 deep and narrow. Labral lamella, scarcely produced. Operculum, 

 slightly concave, rather produced at the upper corner of the labial 

 side ; smooth, but not shining. 



Height 0-033, greatest breadth 0*06, least breadth 0-043. 



Named in compliment to T. L. Taylor, Esq., the possessor of a 

 fine collection of shells. 



Petitia Stricklandiana, Chitty. 



Hab. Roaring River, Westmoreland. 



Form, globose-discoid. Colour, rich red-brown. Sculpture, lines 

 of growth apparent ; 38 inequidistant, irregularly raised, very fine 

 spiral carinse ; on the upper whorls 8. Spire, very little elevated, 

 with convex outlines. Whorls, 3frds, well rounded, with a deep 

 suture. Aperture, widely dilated, not constricted, more dilated and 

 depressed below ; very slightly detached from body-whorl. Labrum, 

 very widely double, moderately produced above, inner and outer 

 edge strongly pectinated' and scolloped by 6 points of the spiral 

 carinse. Labium, very little detached from body-whorl, straight 

 above and abruptly curved below to the right ; much below the 

 plane of the labrum. Umbilicus, deep and rather broad. Labral 

 lamella, very little produced. Operculum, slightly concave, with 

 fine granulations in the hollow ; labral margin with two sharp raised 

 lamellse round it ; a small narrow linguiform point overlapping the 

 labium at the lowest extremity on the labial side. 



Height 0-049, greatest breadth 0*074, least breadth 0*055. 



Named in compliment to H. E. Strickland, Esq., of Apperley 

 Court, Tewkesbury, a liberal collector. 



