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 

 (28701.)!; 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 Indie; Pacific: Sandwich 

 islands, Atlantic: Gulf of Guinea. 



Bathypelagic, probably living in shoals. 



