58 BULLETIN 10 0, UNITED STATES NATIONAL. MUSEUM 



and fifth above pectoral base. Spiracle small, porelike, close behind 

 eye. 



Scales very minute, tridentate, with median keel. 



First dorsal origin close behind ventral base, length 2% in head; 

 second dorsal origin opposite middle in anal base, length 2^ in 

 head ; anal equals head, height 4 in its base ; subcaudal long as head 

 to last gill opening, height of fin 4% in its length; pectoral width 

 11/5 in its length, which 1% in head ; ventral 11/^. 



Uniform dark brown, slightly paler on belly and under surface of 

 head. Inside mouth and gill openings blackish brown. 



Japan. The specimen described above was presented to the Na- 

 tional Museum in 1878, many years before the species was described 

 by Tanaka. Tanaka's account is as follows : 



Depth 8% to subcaudal origin; head 4%. Snout trifle less than 

 2 in head, pointed, broadly curved; eye 51/5, lateral, elevated, mid- 

 way between snout tip and fourth gill opening; mouth moderately 

 curved, upper labial folds slightly less than halfway to hind end of 

 front nasal valve, lower labial fold % to symphysis ; teeth tricuspid, 

 median cusp largest, rather wide set; front nasal valves well sep- 

 arated from each other and from mouth, with cirrus anteriorly; 

 interorbital very broad, gently convex. Gill openings small, sub- 

 equal, equidistant, last above pectoral base. Spiracle small, circular, 

 just behind eye. 



Scales very small, very finely velvety to touch, scarcely enlarged 

 on caudal peduncle and not forming distinct ridge. 



First dorsal small, inserted slightly before anal origin; second 

 dorsal inserted above end of first % of anal base, its base % that 

 of first dorsal; anal long, highest forward, continuous with lower 

 caudal lobe but with deep notch to fin base; caudal not turned up- 

 ward, lower lobe continuous with lower part of upper lobe with 

 slight notch, base length of former 4 times long as that of latter; 

 pectoral rather large, not reacliing ventral, hind edge nearly straight; 

 ventrals separate, extend little over halfway to anal. 



Blackish brown, paler beneath. Hind edges of all fins, edges of 

 gill openings, and inside mouth black. Length, 800 mm. 



U.S.N.M. no. 22632. Japan. Japanese Government. Length, 657 mm. 

 PENTANCHUS PROFUNDICOLUS Smith and Radclifife 



Pentanchus profnndicolus Smith and Radci^ifte, Proc. U. S. Nat. Mus., vol. 41, 



p. 490, fig., pi. 42, 1912 (type locality: Mindanao Sea). — Gaeman, Mem. 



Mus. Comp. Zool., vol. 36, p. 95, 1913 (note). — Heree, Philippine Journ. 



Sci., vol. 26, no. 1, p. 127, 1925 (compiled). — Roxas and Martin, Dept. 



Agr. Comm. Manila Tech. Bull. 6, p. 12, 1937 (reference). 

 Pentachus profundicolns Fowler, Proc. 4th (1929) Pacific Sci. Congr., .Java, 



p. 486, 1930 (type). (Error.) 



