FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 771 



Gazette, vol. 26, No. 368, p. 182, 1896 (Moratabas).— WiaBEai and Beaxibx)RT, 

 Fishes Indo- Australian Archipelago, vol. 2, p. 283, 1913 (compiled). — Hebbe, 

 Philippine Journ. Sci., vol. 31, p. 401, pi. 1, fig. 4 (dentition), 1926 (Lagnna 

 de Bay, Manila market). — Roxas and Mabtin, Dept. Agr. Comm. Manila 

 Tech. Bull. 6, p. 44, 1937 (reference), 

 Ariodes goniaspis Bleeker, Atlas Ichth. Ind. Neerland., vol. 2, p. 42, pi. (12) 60, 

 fig. 1, 1862 (Sumatra). 



Depth 5% ; head 31/3, width 11/2. Snout projects, broadly rounded, 

 depressed, convex, 2% in head ; eye 2% in snout, 2=^/5 in interorbital ; 

 maxillary barbel reaches hind end of head, mandibular almost to 

 pectoral base or li/^ in maxillary, mental 2%; mouth moderate, 

 teeth exposed when closed; upper sharp villiform teeth in curved 

 band, width 4^ in length; lower teeth in longer band, widest me- 

 dially and tapering posteriorly; conic, coarsely granular teeth in 2 

 groups each side, small ovate patch at outer front margin and 

 elongate divergent patch posteriorly; head granulated above; occip- 

 ital process triangulate, lateral edges straight, expanded basally, 

 wide as long, more or less radially granulate, with central keel, 

 slightly notched hind edge touching short, granulate, curved bone 

 before dorsal spine base; median fontanel reaches opposite hind 

 angular preopercle tip; humeral plate sharply triangular, surface 

 rugose. Gill rakers 8 + 12, slender, 2l^ in eye. 



Dorsal ll^ in depth, nearly IV5 in head, spine 1%, front edge 

 rugose and barbed near apex, hind edge barbed; adipose fin base 

 1% in anal base; A. 17; caudal deeply notched, upper lobe longer; 

 pectoral nearly ly^ in head; spine equals dorsal spine, with similar 

 rugosities and toothed barbs, rays 11 ; ventral 2 in head. 



Chocolate brown on head, gradually paler posteriorly along back, 

 whitish below lateral line. Sides of head passing into reddish brown 

 and whitish, all with silvery luster except along median dorsal region 

 of head and back. White beneath. Dorsal and pectorals blackish, 

 more or less hyaline marginally. Adipose fin blackish basally or 

 reddish brown by transmitted light, becomes clear marginally. 

 Caudal reddish brown basally, with silver sheen, rays yellowish 

 brown, become clear posteriorly. Ventral white beneath, somewhat 

 dusky above along outer basal region. Length, 208 mm. (Herre.) 



Sumatra, Borneo, Philippines. 



Genus OSTEOGENEIOSUS Bleeker 



Osteogeneiosus Bleeker, Nat. Geneesk. Arch. Nederl.-Indie, vol 3, pt. 2, p. 173, 



1846. (Type, Osteogeneiosus macrocephalus Bleeker— Silurus militaris 



Linnaeus, virtually monotypic.) 

 Osteogeniosus Gijntheb, Cat. Fishes British Mus., vol. 5, p. 181, 1864. (Type, 



Silurus militaris Linnaeus.) 

 Osteogenius Cantor, Journ. Asiatic Soc. Bengal, vol. 18, p. 1241, 1849. (Type, 



Silurus militaris Linnaeus, virtually. Osteogenius Cantor proposed to 



replace Osteogeneiosus Bleeker.) 



