1061 . 
Genus Trachon urus Gunther 
Trachonurus Gffnther , Rep. Voy. Challenger, vol. 22, pp. 124, 142. 
(Type Coryphaenoides villosus Gflnther , monotypic.) 
I 
Body greatly elongate, strongly compressed, tail very long, 
slender and tapering* Head short, compressed, laterally vertical, 
without prominent ridges. Snout obtuse, short, tip high and nearly 
above front border of mouth. Mouth rather snail. Barbel moderate. 
Teeth in jaws in moderate villifom bands, front premaxillary ones 
somewhat enlarged or on outer series of both jaws enlarged. Bones of 
head firm, suborbital ridge little developed. Gill membranes broadly 
united below preopercle ridge. Gill rakers tubercular. Branchiosteg- 
als 7. Scales snail, adherent, diamond shaped, densely covered with 
sharp erect pointed spinules, strongest on enlarged scales along front 
portion of dorsal and anal base. Naked area behind pectorals, space 
between ventrals and anus also scaleless. Lateral line nearly straight, 
or anteriorly with low curve convexly. Sensory canal system moderately 
developed. Second simple dorsal ray pungent, slender, smooth. Second 
dorsal fin very low. Ventrals inserted below first dorsal, origin con¬ 
spicuously behind pectoral origin, first ray filamentous. Vent remote 
before anal fin. 
Two species in tropical and subtropical seas 
