Morphology of the Fins 



as the name [yecpvpo^, bridge; xepKos, tail) is intended to 

 indicate. Such a tail has been recognized in four genera only, 



Fig. 6S. — Isocereal tail of Hake, Merluccius productus (Ayres). 



-,f:'^" 



Fig. 09. — Homoccrcal tail of a Flounder, Paralichthys californicuf!. 



Mola, Ranzania, Fierasjer, and Echwdon, the head-fishes and 

 the pearl-fishes. 



