TELEOSTEI 



FIG. 498. 

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



'hyf. 



B. 



, . Rlll ' l '8 ed views of three successive stages in the development of Phuroncctes vlatessa, L. 

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

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

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



