343 



TE LEO ST El 



in one family only of living Teleostei, the Elopidae (Fig. 376). 

 In others the right and left branchiostesral membranes either are 



Fig. 329. 



Skull of Albula conorliynchus, B. and S. (From Ridewood, Proc. Zool. Soc.) A, dorsal view; 

 B, view from behind ; C. left-side view, bo, basioccipital ; 6s, basisphenoid ; ct, cartilage; eo, 

 exoceipital ; ep, epiotic; /, frontal; me, mesethmoid ; op, opisthotic; or, orbitosphenoid ; p, 

 parietal; /»;/', postfrontal ; prf, prefrontal; pro, prootic ; soc, supraoccipital ; sq, pterotic 

 (squamosal) ; v, vomer. 



confluent in the mid-ventral line below the isthmus, or, in the more 

 modified forms, they may run forwards without meeting. The 

 branchial slits are continued ventrally far forwards between the 



