186 PLEUBODISCIDAE. 



high type of rupestris. "Whether the high-conic Hispanic 

 jaenensis is directly related to these forms of the Alpic center 

 is doubtful. 



Anatomical considerations suggest that rupestris of authors 

 includes more than one species, but those who have published 

 dissections of these snails have not given the shell characters 

 of material used. Correlation of the anatomic data with 

 conchological racial characters given above is therefore im- 

 possible at present. The variations and races of rupestris 

 stand much in need of revision by some European investigator, 

 as only short-range local views have been published. 



Pyramidula rupestris chorismenostoma (Blanc & Westerl.). 

 PI. 25, fig. 11. 



Shell turbinate, delicately transversely striate, rufous- 

 brown, whitish at the aperture, widely and deeply umbilicate ; 

 whorls 4y^, the upper subcylindric, flattened at the suture, 

 the penult subangulate in the middle, the last whorl depressed 

 subcylindric, wholly or in part free in the manner of Ver- 

 Tiietus. Aperture subcircular [or oval], peristome simple, 

 acute, straight. Diam. 2.5 mm., alt. 2.25 mm. {Westerl.). 



Greece : Syra, around the village of St. Georges, on the inner 

 faces of piles of stones with Lauria umhilicata (Roth) ; Maco- 

 lessos, Beotia. 



[Helix rupestris] subspecies chorismenostoma Blanc & 

 Westerlund, 1879, Aperqu Fauna Malac. de la Grece, p. 32. 



A Beotian specimen is figured. 

 Pyramidula rupestris przevalskii Lindh. 



Differs from the type by the larger shell with less convex 

 base, the umbilicus narrower, nearly cylindric, not dilated be- 

 low; spire much higher for the width of the shell. Shell 

 narrowly umbilicate, turbinate, depressed, thin, striatulate, 

 deep reddish corneous. Spire conoid, the apex rather obtuse ; 

 suture impressed; umbilicus narrow, penetrating, nearly 

 cylindric, scarcely dilated at the base. Whorls 414 to 41^, 

 rounded, slowly and regularly increasing, the last distinctly 



