252 Shark and Compatiy 



The "flying" movement of a typical skate is 

 shown in this series of drawings. The wing-Uke 

 pectoral fins stretch backward and end in 

 points like the wings of swift birds. This flying 

 movement has inspired the calling of some 

 species "Sea Eagles" and "Sea Hawks." 



After Marey 



forms, Selachians produce occasional morphological oddities. Two- 

 headed sharks have been reported— one, of an unrecorded species, was 

 found in the river Nile. Albino sharks and Batoids are not unknown. 



Skates (and rays) are highly specialized forms of sharks that have 

 gone beyond the shark in developing modifications for living on the sea 



