12 



FISHES OF AUSTRALIA. 



In many species, both cycloid and ctenoid scales are 

 to be found on the body of the same fish. 



In the accompanying illustrations are shown two 

 cycloid and two ctenoid scales, from the bodies of four 

 common Australian fishes. 





Fig. ">. TYPES OF CTENOID OR COMB-LIKE SCALES. 



Upper Body Scile of BLACK SOLE. Lower Body Scale of STRU-ED GUDGEON. 

 (Both greatly magnified.) 



Incidentally, it may be here mentioned, that fish-scales 

 form most beautiful and interesting objects for the 

 microscope. The study of them is most entertaining and 



