Palaeontogr. Bd. XVI. 



Tat XVIIl. 



la. 



Ic. 



Ib. 



4. 



/ 



Üa-T 



5a.:^ 



L 



2.? 



7a. 



7b. 



7c.f 



7d. 



lÜ.t.T 



10. 



O' Sptytr a/d not dtl. 



Pleurotoma Koninckü Nyst 



