'45 



T. opaca (fossilisi depresso türbinata, apice obtusa, basi umbilico lato pervio 

 perforata; anfractus 5 valde convexi, sutura profunda disiuncti, subtiliter deuse re- 

 gulariter rostulati; ultimus dilatatus, teres, circa 3 / 7 totius altitudinis aequans; 



Fig. 26. Valvata (Cincinna Hübn ) bohemica n. sp. Polep. 



apertura circularis, [fere soluta marginibus acutiusculis, columellari vie reflexo ; 

 operculum tenue, obsolete spiratum. 



Alt. 4 mm, lat. 5 mm. 



[Cincinna Hübn.] alpestris Blaun. var. Piatti Adarni. Differt a typo anfra- 

 ctibus non teretibus, sutura minus profunda, spira altiore, umbilico angustiore. 



Fig. 27. Valvata (Cincinna Hübn-j alpestris Bl. var. oelandica Westeri. Lodic bei Nimburg 



(holocaen). 



