FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 323 



Carnivorous fishes in tropical seas, some in fresh waters. Many 

 often with quite contrasted color pattern. 



ANALYSIS OP GENERA 



a\ Datnioidinae. Lower jaw well protruded ; preorbital entire ; caudal rounded ; 



back elevated ; with dark vertical bands Datnioides. 



a'. Tebaponinae. Jaws equal or lower shorter ; preorbital serrated, at least in 

 young ; caudal emarginate, rarely truncate ; back not especially elevated, 

 usually low ; usually with horizontal dark bunds. 

 6\ Teeth entire or simple. 



c^. Teeth conic, undivided, in several series Terapon. 



c'. Teeth flattened, triserial above, biserial below Pelates. 



6'. Teeth flattened, tridentate Helotes. 



Genus DATNIOIDES Bleeker 



Datnioides Bleeker, Nat. Tijds. Nrderlaud. Indie, vol. 5, 1853, p. 440. Type 

 Coins polota Buchanan-Hamilton, designated by Bleekeb, Arch. Neerland. 

 Sci. Nat. Harlem, vol. 2, 1876, p. 272. 



Body compressed, back elevated. Eye moderate. Upper jaw well 

 protractile. Preopercle serrated. Opercle with short spine. Teeth 

 conic, acute, in bands in jaws, none on palate. Gill opening little 

 cleft. Pseudobranchiae present. Branchiostegals 6. Air bladder 

 .simple. Pyloric appendages few. Scales 50 to 80 in a lateral series, 

 ctenoid. Maxillary and preorbital scaleless. Dorsal with 12 spines 

 and 13 to 17 rays. Anal spines 3, rays 8 to 10. Dorsal and anal 

 spines strong. Caudal convexly rounded behind. Pectoral pointed. 



ANALYSIS OP SPECIES 



a\ Scales 110 along above lateral line, 90 along below ; dorsal rays 15 to 17. 



microlepis. 

 o^ Scales 70 along above lateral line, 56 along below ; dorsal rays 13 or 14. 



polota. 



DATNIOIDES MICROLEPIS Bleeker 



Datnioides microlepis Bleekek, Nat. Tijds. Nederland. Indie, vol. 5, 1853, p. 442. 

 Pontianak, Kapuas River, Borneo. — Gunther, Cat. Fish. Brit. Mus., vol. 1, 

 1859, p. 339 (compiled). — Bleekek, Atlas lohth. Ind. Neerland., vol. 7, 

 1873-1876, pi. (13) 291, fig. 2; vol. 8, 1877, p. 32 (Pontianak and Sintang, 

 Borneo, Siam). — AIabtens, Preuss. Exp. Ost Asien, 1876, p. 387 (Kapuas 

 River and Danan Sriang, Borneo). 



Depth 2l^ ; head 2^. Snout 3% in head from snout tip ; eye 41/0, 

 1% in snout; maxillary reaches Vs i^i^ eye, length 21/3 in head; teeth 

 very small, outer row little larger; interorbital little elevated; 

 preopercle edge denticulate. 



Scales 110 along above lateral line to caudal base, 90 along below ; 

 22 scales above lateral line, 38 below, 40? predorsal forward opposite 

 front eye edge, 23 on cheek of which 8 on preopercle flange. 



D. XII, 14, I, fifth spine 21/4. in total head length, sixth ray 2; 

 A. Ill, 10, I, second spine 2i/8, third ray 2f'j; caudal 2. convex 



