PLATE H 



W N. 



Royal PKyshcoul Society Ed^mhurgL 



V. 



F^g.6. 



Fzq. U. 



Fza. Q. 



^ 



Fig. 



F-g-i- 



Fiq. B. 



FVQ. S. 



Fvg. IB. 



Fig. 11 



Fiq. S. 



Fi.g. 5. 



Fzg. 10. 



3.] T. Peach, del' 



"M'raTia.-ne JcErsKiTie.LitliTf Edin^ 



diRVAN Silurian 70sses. 



