250 NORTH STAFFORDSHIRE COAL FOSSILS. 



EXPLANATION OF THE PLATE. 

 FIG. 



1. Mandibular tooth of Ctenodus cristatus, Ag. 



2. Palatal tooth of Ctenodus cristatus, Ag. 



3. Fin spine of Gyracanthus formosus, Ag. 



4. Scale of Rhizodus (Holoptychius) Garneri, Murch. 



5. Tooth of Pteroplax cornuta, Hancock and Atthey. 



6. Scale of Rhomboptychius, Hux. 



7. Tooth of Strepsodus sauroides, Hux. 



8. Tooth of Janassa (Climaxodus, McCoy) liriguarformis, 

 Atthey. 



9. Tooth of Pleuracanthus (Diplodus, Ag.) gibbosus 

 10. Tooth of Megalichthys Hibberti, Ag. 

 11. Tooth of Helodus simplex, Ag. 

 12. Tooth of Ctenoptychius apicalis, Ag. 

 13. Tooth of Pleurodus Rankinii, Ag. 

 14. Scale of Megalichthys Hibberti, Ag. 

 15. Tooth of Ctenacanthus hybodoides, Eg. 



