258 SANDAHLIA. 



Friaul from the Birnbaumer Walde over the Trnovaner and 

 Banjsicaer plateaux to the Isonzo valley and beyond into the 

 Venetian Friaul). 



0. rossmaessleri is very distinct from 0. kokeUii by the 

 obese shape, the umbilical crevice shaped like a reversed " s, " 

 the spaced riblets, and the presence of a well-developed supra- 

 palatal tubercle bounding the sinulus. The columellar axis is 

 rather large within, but contracts in the last whorl, closing the 

 umbilicus as described by Eossmaessler, or sometimes leaving 

 a narrow umbilical opening. 



0. rossmaessleri has been reported from northeastern Italy 

 by the Marchesa Paulucci (Materiaux, p. 11) without definite 

 locality; also from the Province of Venetia by De Betta 

 (Malaeologia Veneta not seen by H. P.). Pollonera notes 

 that this species is not rare in some parts of Friuli (Friaul), 

 but it is surely very rare in the Natisone Valley, where he 

 could find but a single example, of a form much more length- 

 ened and with the aperture more contracted by the teeth, but 

 not the typical form figured by Rossmaessler. 



Genus SANDAHLIA Westerlund. 



Sandahlia WEST., Fauna Palaarct. Reg. Binnenconchylien, 

 iii, 1887, pp. 78, 92. 



The shell is cylindric, of many closely coiled whorls; um- 

 bilicate, the umbilicus enlarging within; the hollow columel- 

 lar axis large, widest in the upper part. Aperture having 

 very long lamellae and plicae arranged as in Abida. Type 

 Pupa cylitidricd Mich. 



Distribution: eastern Pyrenees, in the Pyrenees-Orientales, 

 France, and Prov. Gerona, Spain. Living under stones and 

 dead leaves. 



Figured on plate 46. The conchological features of San- 

 dahlia, particularly the large columellar axis (as shown in pi. 

 46, fig. 3), make its recognition as a genus desirable, even 

 though the apertural characters are unmistakably those of 

 Abida. Though the outward form is that of Orcula, I cannot 

 trace the relationship some authors have claimed. In my view 

 the two genera belong to different subfamilies. 



