200 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



spines; rays 15 to 20. Anal spines 3, rays 15 or 16. Caudal truncate. 

 Paired fins short. 



Easily known by the elongated fourth dorsal spine. 



PROTERACANTHUS SARISSOPHORUS (Cantor) 



Crenidens sarissophorus Cantor, Journ. Asiat. Soc. Bengal, vol. 18, pt. 2, p. 1034, 

 pi. 1, figs. 1-4, 1849 (1850) (type locality: Pinang; Malay Peninsula). 



Girella sarissophorus Bleeker, Nat. Tijds. Nederland. Indie, vol. 3, p. 64, 1852 

 (Singapore); Versl. Meded. Akad. Wet. Amsterdam, vol. 12, p. 71, 1861 

 (Pinang) . 



Proter acanthus sarissophorus Gunther, Cat. Fish. Brit. Mus., vol. 1, p. 427, 

 1859 (compiled). — Bleeker, Atlas Ichth. Ind. Neerland., vol. 7, pi. (41) 

 319, fig. 3, 1873-1876; vol. 9, p. 17, 1877 (Singapore; Pinang; Malacca).— 

 KAroli, Termesz. Fiizetek, Budapest, vol. 6, p. 157, 1881 (Matang). — 

 DuNCKER, Mitt. Naturh. Mus. Hamburg, vol. 21, p. 150, 1903 (1904) 

 (Kuala Lumpur). — Vinciguerra, Ann. Mus. Stor. Nat. Genova, ser. 3, vol. 

 10, p. 573, 1926 (Sarawak, Borneo). — Tirant, Service Oceanogr. Pech. Indo- 

 Chine, note 6, p. 168, 1929 (Baria). — Hardenberg, De Treubia, vol. 13, 

 livr. 1, p. 129, 1931 (Bagan Si Api Api; Rokan mouth). 



Depth 2%; head Zji. Snout 2% in head; eye 4}^ to 4%, 2% in snout, 

 l}i to Iji in interorbital ; lower jaw shorter than upper; maxillary 

 reaches % in eye, length 3}^ in head; outer row of teeth conspicuously 

 larger than others; interorbital convex; preopercle feebly denticulate 

 (figure shows only lower edge so); eye 1% in suborbital depth. 



Scales 60 to 68 along above lateral line, 38 to 40 along below 

 (figure shows 68 pores in lateral Hne of which last 5 apparently on 

 caudal base; 8 scales above lateral Une, 17 below, predorsal scales 

 forward above front nostril; about 12 rows across cheek to angle of 

 preopercle edge, flange scaled; soft vertical fins all largely with fine 

 scales). 



D. XVI, 15 or 16 (X, i, 15, i on figure, fourth erect spine 3 in com- 

 bined head and body to caudal base, first branched ray 1% in head); 

 A. Ill, 14 or 15 (III, I, 13, i on figure, second spine 2%, first branched 

 ray 2%; caudal 1%, truncate; least depth of caudal peduncle 2%; 

 pectoral 1%; ventral Iji, first ray ending in short filament). 



Brown or umber-green above, below gray or silvery. Iris yellow- 

 ish or rosy. Each row of body scales with dark longitudinal line, 

 narrow above lateral line and along lower sides of body, largest on 

 flanks; lines mostly following along scale junctures. Fins dilute 

 brown, greenish yellow on golden. Length, 325 mm. (Bleeker.) 



pinang, Malay Peninsula, Singapore, Indo-China. 



Genus CRENIDENS Valenciennes 



Crenidens Valenciennes, Hist. Nat. Poiss., vol. 6, p. 377, 1830. (Type, Creni- 

 dens forskalii Valenciennes, monotypic.) 



One or two rows of wide teeth in jaws, cutting edges crenulated; 

 band of inner granular teeth, but no pointed lateral teeth; no molars. 

 Palate toothless. Pseudobranchiae present. Branchiostegals 5. Air 



