185 



Petitia Fortuneana, Chitty. 



Hab. • ? Manchester. 



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

 spirai cannae, about 8 on the upper whorls. Spire, mucli depressed 

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

 suture. Aperture, constricted at about the width of the lašt whorI 

 ^"^^0 ^^'''"T', ""^^ *^^° expanded considerably at about an angle 

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

 semicircle. Labrum, slightly double, especially above and below 

 less at the penphery ; inner edge smooth, white and shining, broadlv 

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

 and rounded into the labium above ; much produced angularly and 

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

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

 aplanewith the labrum above, and slightly lower below. JJmbi- 

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

 ing the umbihcus. Operculmn, slightly concave, with apparently 

 obsolete bars crossing it horizontally. 



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



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

 Chinese traveller and coUector. 



Petitia Adamsiana, Chitty. 



Hab. New Hope, 01d Hope, and a smaller variety on the road 

 east of the " Water-wheel," Westmoreland. 



J^om, globose-discoidal. Co^om?-, r eddish horn. ^M/^^Mre, 13 very 

 strong spirai carinae, vsdth between the Ist and 2nd and 2ud 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 remaming strong carine. Lines 

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

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

 outhnes. Whorls, 4į, very slightly rounded and very light suture • 

 lašt whorl slightly sweUing behind the labrum, and slightly con- 

 stricted at the aperture. Aperture, very slightly expanded and 

 scarcely detached from the peuult 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-whorl. Umbilicus, moderately deep, co- 

 vered by an expansion very convex extemally 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 



