116 ON AN EEL FROM THE MARSHALL ISLANDS. 



mouth, becomes nearly as high as the body halfway to the 

 end of the tail, and decreases in height forward and back- 

 ward ; the anal is of similar shape, but only half as high. 

 Tail acuminate, tapering regularly from the base, twice as 

 long as head and body. 



Body, head, tail, and inside of mouth cavity black; up- 

 per half of dorsal yellow ; lower margin of anal white ; 

 lower lip white, except at and near the symphysis. 



Total length thirty-three inches, snout to vent eleven. 

 Greatest depth of body about half an inch ; depth of mouth 

 near nine-sixteenths ; length of head seven-eighths ; and 

 from snout to hinder edge of gill-opening two inches. Fig- 

 ures a little more than twice natural dimensions. 



Hah. Ebon Island. 



Cambridge^ Mass.^ May 27, 1888. 



