i348 
head, 2 serrated ridges, beginning on each side behind nostril 
and bordering a concave space, slightly converge towards 
the middle of the occiput and are continued. by 2 strong 
diverging crests, ending in a sharp recumbent spine. Edge of 
praeoperculum serrated near its angle, which is armed with a 
slender, claw-like spine, pointing vertically downward. Gape 
of mouth vertical, bordered superiorly by the slender inter- 
maxillary, the maxillary, the hinder half of which is broad 
and posteriorly rounded, lies behind the gape. Mandibles 
received within the upper jaw, their lower border is denticulated. 
A blunt spine at the symphysis and at its inferior posterior 
angle. Ventral edge serrated, with an anterior and posterior 
spine, followed by a spinulous edge on each side between 
ventrals and anal. Origin of dorsal nearly in the middle of 
the length, preceded by a small bifid spine. Origin of anal 
on the beginning of the posterior third of the length. Low 
adipose fin in the middle of the space between dorsal and 
caudal. Pectorals low down, reaching almost as far as the 
base of the ventrals, which are small. Anus immediately 
before anal. Caudal forked. A band of minute curved teeth 
on intermaxillary and mandibles, and a single series on 
maxilla, similar teeth on vomer. Extremely thin, large, deciduous 
scales. Luminous organs: a black oval antorbital before middle 
of eye, a postorbital one on the same level, a suborbital below 
middle of eye. A smaller opercular below the level of the sub- 
orbital; 6 between branchiostegal rays. A series of 6 between isth- 
mus and base of pectorals. A series of 10 along the ventral edge, 
between humeral and pelvic symphysis. 5 between ventrals and 
anal, the anterior of which somewhat higher than the following. 
Above anal and somewhat behind it, a series of 12—16, behind 
and separated from it a group of 4—5, decreasing in size post- 
eriorly, the last above the first caudal ray. Two above, 3 behind 
the base of the pectorals, above the last of which one high up, 
nearly in the middle of the height of the body. Silvery, back 
yellowish brown. Length 85 mm. 
Habitat: West Coast of Sumatra (470 m.); Madura Sea 
(287 m.)!; Bali Sea (538 m.)!; Macassar straits (450 m.)!; Molucco 
passage (397 m.)!; Arafura Sea (397 m.)!; Timor Sea (421 m.)!; 
Celebes Sea (457 m.). — Tropical Indic; Pacific: Sandwich 
islands, Atlantic: Gulf of Guinea. 
Bathypelagic, probably living in shoals. 
