412 Mr. H. C. Eurnup on South- African 



Var. darglensis, new vai*. 



Melv. & Pons. Ann. & Mag. Nat. Hist. ser. 8, toI. I. (1908) pi. ii, 

 fig. 23 [as Pupa {Fuuxulus) glanvilleana (Anc.)]. 



Shell small, conic-oval, rimate and very narrowly perforate, 

 tliin, sliining, greyish horn-coloured, translucent, sinistral. 

 Spire ovately conic; apex obtuse and mamraillated. Whorls 

 7g, slightly convex, gradually increasing, with suture distinct 

 but not deep, obliquely sculptured with close, sharply-cut, 

 arched oblique stride, except the first 1^ which are smooth, the 

 last more convex, rounded below, much constricted towards 

 the peristome and impressed towards the rima and small 

 perforation, the long inrunning peristomatal processes and 

 spaces between being represented on the outside by alternate 

 grooves and ridges. Aperture upright, irregularly ovate, 

 nearly closed with the follow-ing inrunning white plaits : — 

 parietal 2, the first arising as a narrow thread high on the 

 body-whorl, becoming broader and contorted as it descends, 

 always receding inwards, to below the centre of the aperture, 

 whence it is bent sharply back, embracing the parietal wall, 

 till it is lost sight of in the interior of the shell ; the second, 

 also arising high on the body-whorl, is expanded on the lett 

 till it meets the peristome, with which it combines till the 

 lobe of the labrum is reached, whence it doubles back in two 

 foliaceous folds and descends as a simple plait, receding in- 

 wards and following a line parallel with the first till it too 

 is lost sight of in the interior of the shell; labral 3, of which 

 the upper two are small, though deeply penetrating the aper- 

 ture, and rather close together ; the third, though equally 

 narrow^ is very long and sinuous and as, in its progress 

 towards the interior, it embraces the expanded outer lip, it 

 is lost to sight till the far end reappears in the gullet ; 

 columellar 3, of which the upper two arise, thread-like, on 

 the edge of the labium, becoming stouter as they curve 

 inwards, the upper one entering at the junction of the parietal 

 wall with the columella, and the lower about the middle of 

 the columella, after taking a wide sweep towards the centre 

 of tiie aperture ; the lowest columellar plait is smaller, but 

 long and penetrating : lastly, there are two plaits on the base 

 of the peristome similar to the lowest columellar plait. 

 Peristome widely expanded, but little thickened except by the 

 plaits which arise close to the margin, paler than the rest 

 of the shell, becoming white at the edges, where its outline 

 is slightly peaked at the sources of the plaits ; the ends con- 

 verge and are connected by a stout glossy callus reaching 



