LEPID0STEID2E 
441 
Lepidosteus viridis ; outline of bones of head of the recent fish, left lateral, and left half of superior aspect. 
ag., angular ; c.o., circumorbitals ; cor., coronoid ; d., dentary ; eth.na., ethmonasal ; fr., frontal; i.op., interoperculum ; mx., maxilla; 
na., nasal; op., operculum ; orb., orbit; p.op., preoperculum ; pa., parietal ; pmx., premaxilla; pro., preorbital; s.o., suborbitals ; 
s.op., suboperculum ; st., supratemporals ; sq., squamosal. [From a preparation in Central Hall of the Museum.] 
