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UNDERWATER GUIDE TO MARINE LIFE 



r, / 



Fig. 16. Top. The round sting ray, Urolophus, is mottled to resemble its suhstrate. 

 This ray, though small, has a very -powerful sting. Bottom. The southern sting ray, 

 Dasyatis americana, is most easily identified hy the large, finlike fold beneath 

 the tail. 



