Fishes of the IP^estern North Atlantic 3 



Descriptions. The descriptions are based on the Study Material listed under each 

 species, except for Urotrygon microphthalmum and Mobula mobular, no specimens of which 

 were available. The accounts of habits and distribution are based on published data, 

 on information from correspondents whose assistance is acknowledged, and on our 

 own observations. 



Figure i. Outlines of a typical Skate to illustrate terminology and methods of measurement. 



