V. Koenen. Norddeutsches Unter-Oligocaen. 



Abhandld oeol. Laadesansialt BiX.Heftiy. 



Taf. LXl. 



'J 



17 



r7 



Ö. Peters g-ez 



Iichtdi-ack v; A- Fi IS cii.Eer io) . 



