S7l 
4 
* Barbel with small bulb bearing minute knob braueri. 
No pectoral fins. 
1 
d. FHOTONECTES. Depth 6 to 9; dorsal and anal fin relatively short; ven- 
trals much nearer caudal than head. 
1 
e. Barbel shorter than head; stem black, bulb half black and half white, 
terminal part slender, translucent, white swelling at tip 
achirus» 
2 , 
e. Barbel shorter than head; no bulb, stem black, terminally slender, 
f 
translucent, with white tip caerules cens # 
3 
e* Barbe} shorter than head; stem black, short, 1 rge bulb white, terminal 
appendage with stalk and translucent leaf like expansion 
phyllopogon# 
4 
e* Barbel long as head; stem short, black, bulb white, long terminal part 
tapering, with, luminous bodies, terminal translucent expansion with 
minute white body mirabilis# 
5 
e. Barbel longer than head; stem tapering, small white bulb with terminal 
filament albipennis. 
2 
d. DOLICHOSTOMIAS. Depth 10 l/2 or more in length; dorsal and anal fins 
long and low; ventral nearer head than caudal 
gracil is» 
Dorsal and anal membranes thick, black, only tips of rays visible with age; 
ventral photophores 42 to 48 between isthmus and ventral# 
1 
_f # MICROGHIRICHTHYS. Two minute pectoral rays# 
1 
r. Barbel with spherical bulb, much less than 1/2 stem; lateral photo¬ 
phores 34 to 36 between gill opening and ventral, ventral series 36 
