FISHES OF THE PHILIPPINE SEAS AND ADJACENT WATERS 81 



Heterognathodon microdon Bleeker, Nat, Tijds. Nederland. Indie, vol. 4, p. 464, 



1853 (type locality : Batavia). — GtJNTHER, Cat. Fish. Brit. Mus., vol. 1, p. 



366, 1859 (Louisiades) . 

 Pentapus microdon Bleeker, Atlas Ichth. Ind. N^erland., vol. 7, pi. (20) 298, 



fig. 1, 1873-1876; vol. 8, p. 101, 1876-1877 (Java; Amboina). 

 Pentapus Irivittatus (not Block) Fowler, Mem. Bishop Mus., vol. 10, p. 217, 



1928 (Shortland Island). 

 Pentapodus trivittatus Fowler, Proc. Acad. Nat. Sci. Philadelphia, 1929 (1930), 



p. 642 (Shortland Island example). 

 Pentapus pleurostictus Duncker and Mohr, Mitteil. Zool. Mus. Hamburg, 



vol. 44, p. 64, fig. 3, 1931 (type locality: Thilenius Harbor, south coast 



New Pomerania) . 



Depth 3Ko to ZYi] head ^% to d%, width 1% to 2%. Snout 2% to d% 

 in head; eye 3 to 3%, greater than snout in young to 1% with age, 

 greater than interorbital in young to 1 % with age ; maxillary reaches to 

 or % in eye, expansion 2% to o% in eye, length 2% to 2% in head; teeth 

 fine, in villiform bands of 4 or 5 irregular series anteriorly in jaws 

 and outer enlarged row above, also 4 outer front curved upper ca- 

 nines and larger one flaring out each side, anteriorly below; lower 

 teeth with enlarged outer row only after canines where soon replacing 

 villiform teeth; interorbital 3}^ to 4, broadly and slightly convex; pre- 

 opercle edge entire; opercle with small flat spine. Gill rakers 5 + 5, 

 short spinescent tubercles, about % of gill filaments, which 2K in eye. 



Scales 41 to 44 in lateral line to caudal base and 1 or 2 more on 

 latter; 3 or 4 above, 10 or 11 below, 27 to 33 predorsal nearly forward 

 to nostrils; 11 rows on cheek, of which 5 on preopercle flange. Supra- 

 scapula minutely ctenoid. Scales with 7 to 9 basal radiating striae; 

 67 to 150 apical denticles, small, short, with 1 or 2 transverse series 

 of basal elements; circuli very fine. 



D. X, 9, I, fourth spine 2Ko to 2% in head, sixth ray 1% to 2; A. Ill, 

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

 peduncle 2% to 2%; pectoral 1% to 1%; ventral IK to 1%; caudal 2% to 

 3Ko in combined head and body to caudal base, deeply emarginate and 

 lower lobe little shorter. 



Back brown or drab-brown, also most of sides, under surface 

 whitish. Young with pale streak from above eye along upper edge 

 of predorsal and back far as soft dorsal at least; second broader pale 

 or whitish streak from upper hind eye edge to bases of last dorsal 

 rays; third white band from lower front preorbital edge to lower eye 

 edge, front then continued from lower hind eye edge above pectoral 

 base and back to middle of caudal base, widest of pale bands, in some 

 specimens yellowish white in color. With age lowest broad band 

 most distinct especially on flanks. Iris yellowish brown. Dorsals, 

 caudal, and pectorals pale brown, last with narrow basal transverse 

 dusky line or bar. Ventrals and anals pale yellowish white. 



East Indies, Philippines, Micronesia, Melanesia, Polynesia. My 

 small examples agree largely with Bleeker's figure of Pentapus bifas- 



