388 
short row on each palatine; 2 pairs on basibranchials; no teeth on gill 
arches. Barbel with basal 2/3 black, slender; terminal part white or lightly 
» 
pigmented, thicker, tapering to fine point, bearing anterior and posterior mem¬ 
branous expansions and basally pair of oblique lateral membranes; near base of 
swollen part short slender white anterior branch, flanked by pair of membranous 
lobes, terminally to which 1 conspicuous and few minute luminous bodies* Dorsal 
rays 54 to 74, long, extend forward nearly to or before ventrals. Anal rays 34 
to 49, shorter than dorsal. Dorsal and anal rays rather wide set, except post¬ 
eriorly and pair of spiny projections at base of each. No pectoral. Ventral 
rays 6. 
1 
ANALYSIS OF SPECIES 
a. Ventral below or behind dorsal origin. 
1 
b« Ventral well behind dorsal origin, distant from anal 1/2 distance from 
snout antrostomus. 
2 
b. Ventral little behind dorsal origin, distant from anal •s5«ikless than 1/2 
thg$r distance from snout; 22 photophores between ventral and anal origins 
atlanticus. 
3 
b. Ventral below fifth to tenth dorsal ray, distant from anal at least 3/4 
their distance from snout; 16 to 22 photophores between ventral and anal 
or igins panameils is. 
4 ' 
b_* Ventral below first to eight dorsal rays, distant from anal more than l/2 
their distance from snout; 15 to 18 photophores between ventral and anal 
origins fasciola. 
2 
a. VentraJ well in advance of dorsal niger. 
