215 



elongate one (this last one may be on pterygoids). No teeth 

 on vomer in specimens examined. First spine of first dorsal 

 minute, second one stronger but shorter than third one 

 and slightly shorter than postorbital part of head. Origin of 

 second dorsal well in advance of that of anal, its spine half 

 as long as second one of first dorsal. Caudal deeply forked, 

 •the lobes pointed. Pectorals with all their rays simple, surpassing 

 length of head by three eye-diameters. The two upper pectoral 

 filaments reach far behind tip of caudal, the third reaches 

 on caudal, the fourth on anal, the 5tli — 7th to end of ventrals 

 or nearly so. Ventrals equal to postorbital part of head. Distance 

 between origin of ventrals and of anal much more than length 

 of head. Colour of alcohol specimens brownish above, yello- 

 wish below. Fins dusky, pectorals black. [A specimen of 

 Bleeker's collection in the Leiden Museum seen by us]. 



Habitat: Sumatra (river Bandju asin and its tributaries); 

 Borneo (Sinkawang, Sampit, Kahajan, Banjermassin, river Baram 

 {hilleri) ). 



Fresh and brackish water. 



12. Polynemus dubius Blkr. 



Polyiicmus loiigijUis Bleeker, Nat. Tijdschr. Ned. Indie I. 1851, p. 268 (nee C.V.). 

 rolynemiis duhhts Bleeker, Vevh. Bat. Gen. XXV. 1853. Nalez. Iclitli. Fauna 

 Bengalen, p. 92. 



D'. VII; D-. I. 16; A. II.ii; P. 17+;; V. 1.5; L.1.67; L.tr. j_. 



15 

 Height equal to head, 3.9 in length, 5.4 in length with 



caudal. Eyes small, almost 7 in head, 1.8 in convex interorbital 



space, 1.5 in snout and 4.4 in postorbital part of head. Mouth 



large, reaching far behind eye. Maxillaries scaly, 2.2 in head, 



not emarginate at symphysis. Head covered with scales to 



end of snout. Anterior and posterior nostrils close together, 



close to eye. Praeoperculum very feebly serrated, its angle 



rounded and scarcely produced. Upper lip absent, lower lip 



well developed but not continuous at symphysis. Bands of 



small teeth on jaws, not extending to their outside, an 



oblong patch of similar teeth on palatines and a small patch 



on vomer. Origin of dorsal between that of pectorals and 



ventrals. Spines of first dorsal soft and flexible, the first one 



not minute but almost as long as second, which is the longest, 



and a little shorter than head without snout. Origin of second 



