16 ORCULA. 



whorl very short, not dilated below towards the aperture, but 

 the suture ascends strongly near its termination. The whole 

 shell is quite thin. The lip is slightly expanded, without in- 

 ternal callus. The thin, high parietal lamella emerges to the 

 edge of the thin parietal callus. Inside it becomes wider, 

 flaring, with somewhat waved free edge, penetrating to the 

 ventral side. The columellar lamella emerges to the peri- 

 stome and is strong within the last whorl on the left side. 

 The supracolumellar lamella is weaker and shorter. 



In specimens seen the length varies from 5 to 6 mm. It is 

 sometimes a little narrower and more cylindric than in the 

 shell figured. 



4. Orcula schmidtii (Kuester). PI. 1, fig. 11. 



The shell is ovate-conic or shortly cylindric, very obtuse, 

 broad above, with a dull luster, very finely ribbed, the riblets 

 oblique and epidermal, as in P. doliolwm. The umbilicus is 

 round and deep. The 8-9 whorls are slightly convex, very 

 low, increasing only very gradually in height and united by 

 a simple, impressed suture. Aperture rather large, semi- 

 ovate, nearly rounded-triangular. Peristome sharp, only 

 slightly expanded, scarcely thickened, sometimes connected 

 with the very large oblique parietal lamella by a very thin 

 callus. Columella with two horizontal folds, the upper one 

 generally larger. Of a corneous brownish-red, the apex 

 paler ; aperture dirty flesh-color, peristome and lamellae white. 

 Length 1.8 to 2.5, diam. 1.33 lines (Kuester). 



Length 5.2, diam. 3 mm. ; 8% whorls. 



Montenegro: Cettinge, under stones on limestone cliffs 

 (Kuester, June, 1842) ; Western Montenegro (Reitter). 



Pupa schmidtii Kuester, Syst. Conch. Cabinet, Pupa, , 



p. 26, pi. 3, f. 20-23 ; Ber. nat. Ges. Bamberg, ix, 1870, p. 98. 

 — Pfr., Monographia, ii, 327. — Orcula schmidti Boettger, 

 Bericht Offenbacher Ver. Naturkunde, 1880, p. 109. 



The parietal lamella becomes low within the ventral part 

 of the last whorl, both columellars being strongly developed 

 there. 



This rare species is smaller than 0. dolium, more strongly 



