355 
iL • Second pectoral ray -g- longer than first 
ray; ventj^al origin midway between hind 
preopercle edge and caudal base ——» 
exsiliens, 
.2 
£, • Single barbel at chin; D, 13,——— monocirrhus, 
iL . Broad skinny flap at front of each mandibular 
ramus, lower edge fringed,——————solandri, 
> 
, Cypselurus, Anal origin opposite middle of dorsal 
base, branched rays 8 or 9, 
.1 
ii • Pectoral dark, with transverse hyaline 
bandj caudal without white spots, 
± , Head and body without bars, 
.1 
jL » D, I3j A, 8j ventral white, 
medially gi*ay, —— aroticeps 
.2 
jl . D, 14 to 16; A, 9 to 11; terminal 
half of ventral and posterior 
half of dorsal black,—nigricans 
A , D, 13; A, 10 or 11; dorsal and 
ventral tiniforraly dusky, ——— 
——_————— altipennis 
i • Head and body with 6 brown cross bars. 
, D, 13 or 14; scales 55 to 60,— 
furcatus 
, D, 10 or 11; scales 48, ——— 
hexazona. 
