5S^ 



The True Sharks 



ceous of England. Myliobatis dixoni is common in the Euro- 

 pean Eocene, as is also Myliobatis toliapicus and Aetobatis 



Fig. 349 — Eagle-ray, Aetobatis narinari (Euphrasen). Cedar Keys, Fla. 



irregularis. Apocopodoii scriacus is known from the Cretaceous 

 of Brazil. 



Family Psammodontidae. — The Psaiiiuiodoiitidcc are known 

 only from the teeth, large, fiat, or rounded and finely dotted or 

 roughened on the upper surface, as the name Psantjuodus {i/:djj/.io£, 



