EXPLANATION OF PLATE V. 



Figs. I AND 2. — Side and front view of the head of Ceratoptcra 

 orissa, y\ nat. size. In fig. 2 the band of teeth 

 can be seen close to the lower margin of the 

 mandible; black paper has been placed in the 

 left nostril. 



Fig. 3. — Vertebral column and dorsal fin of the same fish. 



