EXPLANATION OF PLATE LXVI. 



PUuracanthus [Diplodus) Imissimtis, Agass. 

 Figure 



1. Upper jaws (palato-quadrates). Opposite side of specimen represented on Plate lxv. Reduced 



to half diameter. 



a. Eight upper jaw. 



/). Left upper jaw ; each with wide lateral expansion, forming osseous plates, joining 

 along the median line of the palate. 



c. Anterior extremities of palato-quadrates, to which were attached the bones of the 

 snout (PI. LXV., c.c). 



d. Inferior surface of cranial plate exhibited on PI. xlv. 



e.e. Inferior surface of plates indicated by same letter on PI. lxv. 



Formation and Locality. — Low Main Coal Seam, Newsham. 

 Ex coll. — Atthey Collection, Museum, Newcastle-on-Tyne. 



[4] 



