DR. RICHARDSON'S DESCRIPTION OF AUSTRALIAN FISH. 185 



PLATE X. 

 Fig. 1. OsTRAcioN SP1L0GA9TER (Rich.), natural size. 



1 a. Vertical section of ditto. 



Fig. 2. OsTRACioN ORNATUS (Gray), natural size. 



2 a. Vertical section of ditto. 



PLATE XI. 

 Fig. 1. OsTRACioN FLAviGASTER (Gray), natural size. 



1 a. Vertical section of ditto. 



Fig. 2. Narcine tasmaniensis (Rich.), half the natural size. 



2 a. Under surface of ditto. 



2 h. Dental plate of under jaw, enlarged. 



