2110 
Antorbital luminous organs 1 or 2 and sometimes 1 or 2 suborbitals, 
often greatly englarged. Pectoral photophores 5, penultimate always out 
of level of series, greatest interspace between first and second. Supra- 
pectoral always above level of pectoral fin base. Both subpectorals in 
line with pectoral, oblique to base of pectoral fin. Ventrals 5, first 
3 progressively elevated. Anals in 2 groups, 4 to 6 f 4 to 6. Supra- 
anals in inclined line. One posteroanal. Precaudals always 4, separated 
from posteroanals. Photophores with more or less distinct dividing black 
septum. No luminous organs dorsally on lateral line. No precaudal 
luminous scales though one often at suprapectoral. 
