185 



Petitia Fortuneana, Chitty. 



Hob. ? Manchester. 



Form, globose-discoid. Colour, very pale horn. Sculpture, 25 

 spiral carinse, about 8 on the upper whorls. Spire, much depressed, 

 with convex outlines. Whorls, 4, moderately rounded, with light 

 suture. Aperture, constricted at about the width of the last whorl 

 from the labrum, and then expanded considerably at about an angle 

 of 30°, expanded above and deflected slightly below ; more than a 

 semicircle. Labrum, slightly double, especially above and below, 

 less at the periphery ; inner edge smooth, white and shining, broadly 

 but slightly scolloped and finely pectinated by about 5 points ; joined 

 and rouuded into the labium above ; much produced angularly and 

 deflected above ; produced from the body-whorl at an angle of about 

 60°. Labium, straight, with a slight curve to the right below ; on 

 a plane with the labrum above, and slightly lower below. Umbi- 

 licus, very deep. Labral lamella, very sharp and narrow, not cover- 

 ing the umbilicus. Operculum, slightly concave, with apparently 

 obsolete bars crossing it horizontally. 



Height 0-043, greatest breadth 0-078, least breadth 0-061. 



Named in compliment to Robert Fortune, Esq., the celebrated 

 Chinese traveller and collector. 



Petitia Adamsiana, Chitty. 



Hab. New Hope, Old Hope, and a smaller variety on the road 

 east of the "Water-wheel," Westmoreland. 



Form, globose-discoidal. Colour, reddish horn. Sculpture, 13 very 

 strong spiral carinas, with between the 1 st and 2nd and 2nd and 3rd, 

 1 each rather less strong ; between the 3rd and 4th and 4th and 

 5th, 3 each less strong ; between the 5th and 6th, 1 less strong ; 

 between the 6th and 7th, 3 less strong ; between the 7th and 8th, 

 1 less strong, and none between the remaining strong carinse. Lines 

 of growth very faint ; on the upper whorls, 4 strong carinas with in- 

 tervening less strong. Spire, slightly elevated, with rather convex 

 outlines. Whorls, 4%, very slightly rounded and very light suture ; 

 last whorl slightly swelling behind the labrum, and slightly con- 

 stricted at the aperture. Aperture, very slightly expanded and 

 scarcely detached from the penult whorl. Labrum, appressed to the 

 body -whorl, not produced, much thickened, slightly double below ; 

 smooth and simple. Labium, much thickened and reflected towards 

 the umbilicus in its centre, slightly curved to the right below ; well 

 detached from the body-w T horl. Umbilicus, moderately deep, co- 

 vered by an expansion very convex externally of the labral lamella, 

 which is much produced immediately after leaving the labrum, and 

 then becomes abruptly narrowed till it joins the body-whorl. In the 

 labral lamella it approaches the subgenus Agassizia. Operculum, 

 very peculiar, deep concave in the centre and studded with very fine 

 granulations ; edge all round very much thickened and folded over 

 in vertical plaits outside, especially at the lower end of the labial 



