Class IV. MORRIS. 159 



The aperture to the gills large. 



It wanted the pecEloral, ventral, and caudal fins : 

 the dorfal fin was extremely low, and thin, extend- 

 ing the whole length of the back very near the 

 tail. The anal fin was of the fame delicacy, and 

 extended to the fame diftance from the anus. 



The 



