1709 
Antorbital luminous organs not especially enlarged. 
Orbital photophores small. Pectorals, ventrals and anal pho- 
tophores all nearly at same level, rarely penultimate pect- 
oral or second ventral elevated from plane of series, Anals in 
1 or 2 groups. Precaudals always 2, usually well separated 
from last posteroanals, rarely continuous. Photophores with¬ 
out black dividing septum. No luminous scales. Luminous sup- 
racaudal and infracaudal plates, seldom both present in one 
individual. Dorsal fin shorter than anal fin. 
