o. POSTHUMUS: "Etapteris Bertrandi Scott, a new Etapteris from the Upper 

 Carboniferous (Lower Coal-Measures) from England, and its bearing to 

 stelar-morphological questions". 



Fig. 1. 



Fig. 2. 



Fig. 4. Fig. 3. 



Proceedings Royal Acad. Amsterdam. Vol. XXVI. 



Fig. 5. 



