1 66 



S EL AC HI I 



greatly enlarged and transversely elongated. They form a mosaic of 

 closely fitting blocks of vasodentine. 



sp. 



FIG. 129. 



Dorsa 1 view of, A, Eiija clavafa, L. ; 13, MylioMtis aquila, L. ; C, Cephaloptcra giovnae, Lac. 

 (Alter Day.) .</, anterior dorsal fin ; a.pv, anterior lobe of pelvic fin ; ce, " cephalic " fin ; c./, 

 caudal fin ; t7, clasper ; d, patch of large denticles ; p.d, posterior dorsal tin ; p.f, pectoral fin ; 

 jip, pelvic lin ; ,>, spine ; sp, spiracle. 



Fie. 130. 

 Jaws and teeth of the Eagle-Ray, Myliobdtis aquila, L. (After Owen.) 



Myliobatis, Cuv., and Aeobatis, M. and H., warm seas ; to Eocene, 

 Europe and N. America. Promylivbatis, Jaekel ; Eocene, Italy. 



SUB-FAMILY 2. DICEROBATINAE. With paired cephalic-fin processes. 

 The teeth, which are closely set in many rows, may be small and almost 



