106 
villianus LACEPEDE, raonotvpic. 
Body elongate, compressed, with short or little distinct caudal peduncle. 
Head rather long, subconic. Snout extended, tube like. Eyes large, prominent. 
Mouth small, terminal on tubular snout, upper jaw edge formed by premaxillary 
and maxillary. Teeth uniserial, in jaws only. Nostrils high, above front 
orbital angle. Gill opening wide below, contracted above but not extending 
* 
above pectoral fin. Gill rakers well developed. Pseudobranchiae nearly rudi¬ 
mentary. Branchiostegals 5. Scales minute, hardly imbricate, head naked. 
Dorsal short, posterior on tail. Anal long. Caudal small, forked. Paired 
fins small. 
Rather small deep sea fishes of the Indian Ocean, known chiefly by their 
tube like snout with the small terminal mouth. Triurus Lacep&de, described 
with a single tooth in each jaw, though the ventrals not mention is likely 
synonymous or closely allied. Its imperfectly khown genotype is known as 
follows: 
Triurus bougainvill i anus Lac^pdde 
P \ 
Triurus bougainvillianu s LACEPEDE, Hist. Nat. Poiss., vol.2, 1800, pp. 200, 
201 . Mer du Sud (entre le 26 et le 27 ° S. L. 103 ou du 104 Long.) 
Tail compressed, much deeper than wide, head compressed, somewhat flat- 
* 
tened above ; snout prolonged, tubular, narrow; eyes very large; motvth term¬ 
inal on snout, round, perhaps not closing; ;at bottom of tubular mouth 2 bpny 
jaws, each with single sharp triangular tooth, no teeth on palate or tongue. 
Branchiostegals 5# 
Scales very small, imbedded. 
