Branchial Muscles of Five Eel Families — Nelson 
351 
ELI 
Fig. 2. Conger marginatus, dorsal gill arch muscles, dorsal view of left side, showing parts of efferent 
branchial arteries. A4, Adductor 4; AO, obliquus inferior accessorius; ELl-4, levatores externi 1-4; ILl-2, 
levatores interni 1—2; 102—3, obliqui inferiores 2—3; PO, obliquus posterior; S, sphincter esophagi; SO, 
obliquus superior. 
