72 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Back slate brown, below white. Narrow dusky longitudinal band 

 from snout tip over opercle, axial on body to caudal base medially. 

 Iris yellow. Fins pale. Length, 175 mm. (Quoy and Gaimard.) 



Western and North Australia. 



PENTAPODUS MACRURUS (Bleeker) 



Heterognathodon viacrurus Bleeker, Nat. Tijds. Nederland. Indie, vol. l,p. 101, 

 1850 (type localitj^: Batavia, Java). — Gunther, Cat. Fish. Brit. Mus., 

 vol. 1, p. 363, 1859 (compiled). 



Pentapus macrurus Bleeker, Atlas Ichth. Ind. N6erland., vol. 8, p. 103, pi. 

 (62)340, fig. 4, 1876-1877 (Java). 



Pentapus formosulus Snyder, Proc. U. S. Nat. Mus., vol. 40, p. 531, 1911 (type 

 locality: Naha, Okinawa); vol. 42, p. 500, pi. 64, fig. 1, 1912 (type).— 

 Schmidt, Trans. Pacific Comm. Acad. Sci. U. S. S. R., vol. 1, p. 47, 1930 

 (Kominato, Riu Kiu). 



Depth 3K to 3%; head 3K to 3%, width Ifs to 1%. Snout 3/8 to 3K 

 in head; eye 3}^ to 3%, greater than snout to equal with age, 1 to 1}$ 

 in interorbital ; maxillary not quite or reaching opposite front eye 

 edge, expansion 2% to 3 in eye, length 3 to 3^ in head; teeth fine, in 

 narrow bands in jaws, anteriorly about 5 to 7 irregular rows with 

 outermost row enlarged, of it 3 or 4 as still larger median canines; 

 also pair of low or short wide set canines in lower jaw% shghtly flaring 

 outward; interorbital 2^ to 2%, broadly and slightly convex; pre- 

 opercle edge entire; single moderate, flattened opercular spine. Gill 

 rakers 4 + 5, short, finely spinescent tubercles, about % of gill fila- 

 ments, which 1% in eye. 



Scales 44 or 45 in lateral line to caudal base and 1 to 3 more on 

 latter; 3 or 4 above, 13 below, 26 to 36 predorsal forward above 

 nostrils, 10 or 11 rows across cheek to preopercle edge of which 3 

 rows on preopercle flange. Suprascapula with slightly crenulated 

 edge. Scales with 6 or 7 basal radiating striae; 103 to 120 apical 

 denticles, small, with 2 or 3 series of basal elements; circuli very fine. 



D. X, 9, I, fourth spine 2}i to 2% in head, first ray 2% to 2}i; A. Ill, 

 7, I, third spine 2% to 3, first ray 2% to 2%; least depth of caudal 

 peduncle 2^ to 2%; pectoral 1%; ventral iKo to 1%; caudal 2% to 3 in 

 combined head and body to caudal base, deeply emarginate, upper 

 lobe little longer and lobes without filaments. 



Back drab-brown to fawn color or tawny, below whitish. Pale 

 yellowish band about wide as pupil, ill defined, extends from snout 

 tip to middle of caudal base. Iris yellowish. Fins all very pale or 

 light brownish, ventrals and anals more or less whitish. 



East Indies, Philippines, Riu Kiu. Greatly like Penta'podus 

 nemurus though differs at once in the structure of its caudal fin. 

 This, though with long slender pointed lobes of which the upper 

 always the longer, does not end in a long filament above and below. 

 No markings evident in alcoholic specimens except the median lateral 

 yellow band. 



