1 66 



SELACH1I 



greatly enlarged and transversely elongated. They form a mosaic of 

 closely fitting blocks of vasodentine. 



A 



, 

 pv, pelvic tin ; .?, spine ; sp, spiracle. 



FIG. 130. 

 Jaws and teeth of the Eagle-Ray, Myliolmti* 



iln, L. (After Owen.) 



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

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



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

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



