DIPLACANTHUS GKACILIS. 



71 



scutiger, Parexus recvbrviiSy and other fossils characteristic of the 

 Old Red Sandstone of that locality. 



Explanation of Plate IX. 



rig. 1. JDiplacanthus gracilis, belonging to Mr. Brewster. 

 Fig. 2. Scales highly magnified. 



P. DE M. Grey Egerton. 



Oulton Parky January 1861. 



