470 



TELEOSTEI 



FIG. 498. 

 Restoration of Amphistium paradoxum, Ag. ; Upper Eocene. (After Boulenger.) 



FIG. 490. 



Enlarged views of three successive stages in the development of Pleuroiiectes pMessa, L. 

 (After Cole and Johnstone.) Stages A and B are still symmetrical, a, anus ; a.f, anal fin ; d.f, 

 dorsal tin ; e, ear ; hy.f, hypochordal caudal fin ; I, left eye, which migrates ; p.f, pectoral tin ; 

 r.e, right eye, which remains on the ' ocular ' side ; y.s, yolk-sac. 



