339 



Membrane between dorsal, anal and caudal rays reticulated 

 or spotted. Length 195 mm. 



Nom. indig. : Tambakan, Katoprak (Malay, Batavia), Sa- 

 lintja (Djambi, Palembang), Belontja (Palembang). 



Habitat: Singapore; Sumatra (Palembang!, Bagan Api Api !, 

 Gunung Sahilan!, Laut Tador, Sungei Mahe, Sungei Si Russi, 

 River Kwantan, Upper and lower Langkat, Danau baru, Indra- 

 giri, Djambi!, Muarah Kompeh); Java (Batavia!); Borneo (Banjer- 

 massin, Kahajan, river Kapuas, Lake Danau Sriang, Sebruang, 

 Pontianak, Montrado, Sinkawang, Sambas, Seminis, Mandhor). 



In rivers and ponds. 



3. Helostoma Cuvier. 



(G. Cuvier, Regne Anim. 2ieme edit. Vol. II. 1829, p. 228, 

 Cuvier & Valenciennes, Hist. nat. Poiss. VII. 1831, p. 341). 



Compressed, oblongly-oval. Mouth protractile; its cleft hori- 

 zontal, very small, ending far distant from orbit. Jaws equal, 

 with thick lips, provided with some series of small, moveable, 



Fig. 88. Helostoma teiiniiin:ki C.V. 



generally black-tipped teeth; other teeth are wanting. Prae- 

 orbital serrated. Scales ciliated, regularly arranged, of mode- 

 rate size; lateral line interrupted below soft dorsal, continued 

 lower down. Dorsal with 16 — 18 spines') and 13 — 16 rays, 

 its origin in advance of that of anal, which has 13 — 15 spines 

 and 17 — 19 rays. Soft dorsal and anal obtusely rounded and 



l) An abnormal specimen with D. XII. 14 and A. \'III. 17, was described l)y 

 lli.EEKER as //. oligacanthiis (vide infra). 



