633 
Family MHROENESOCIDAE 
Body greatly elongated, eel like, anteriorly partly cylindrical* 
Tail long, compressed* Jaws not excessively elongated though conspic¬ 
uous and conic. Vomer well armed with teeth. Tongue largely adnate. 
Hind nostril not labial* Gill openings rather wide, narrowly separated 
belo’w, Branchiostegal membrane connects opposite sides below. Body 
soaleless. Lateral line present. End of tail surrounded by caudal fin. 
Pectoral well developed. Vent in front half of body. 
Plain colored eels, some of large size, living in rather deep water 
and resembling the congers. Found in all tropical and subtropical seas. 
