Xov.ira Kxpt'ililion Xcij-Sci'l.'iiid Alilh l';il;in>nliil<i<;'ir, Zillcl: Mollusc n . Krtiinnil 



Taf.XII. 



Kud.Schonnn.i.Nal ^f7, u lilh 



th u 'i-(lr i d.k.k Hof-u StaatsdruckeiPi 



