O94 
PLATE LXIV. 
Fig. 1. ORACANTHUS MILLERI, Agass., 3 ‘ 5 0 . : : 
Posterior view of bony dermal covering, with wide and open basal cavity. 
» 1a. Anterior aspect of the same specimen, 
», 16. Transverse section of the same. 
», 1c. Longitudinal section of the same specimen. 
Mountain Limestone, Bristol, A Ex coll. Enniskillen Collection. 
Fig. 2. ORACANTHUS MILLERI, Agass., ° ° D6 . ° : 
Very large specimen ; imperfect, very thin, and flattened. 
Mountain Limestone, locality not known. 
Ex coll, Museum of the Geological Society, London. 
Page 
525 
525. 
