the Coelacanth Fish. 



327 



ethmoid. It is a tliin shell of bone consisting of an oral 

 plate which continues that of the palatine, and is perforated 

 antero-iaterally by a small foramen; and a lateral vertical 

 plate which anteriorly passes gradually into the oral part, 

 but posteriorly is sharply marked off by a ridge, the lateral 



Fig. 4, 



Macropoma mantelli. The palate, x 1. 



Reference-letters as before. The reference-lines of P.V. and Pal. end 

 on the tooth- 



surface being recessed to receive the anterior edge of the 

 palatine. 



The hinder end of the prevonier passes dorsally to the 

 anterior end of the parasphenoitl. 



