1 66 



Head from tip of upper jaw to branchial opening 2.6 3 in 

 trunk. Entire head 2 2.3, 2.2 2.6 in length with caudal. 

 Length of lower jaw beyond extremity of upper jaw 3 4 in 

 length, 3.3 4.6 in length with caudal. Eye more than twice 

 in postorbital part of head, and a little less than interorbital 

 space. Triangular part of upper jaw nearly twice as long as 

 broad, scaly. Praeorbital more or less rounded, much shorter 

 than eye. Teeth conical, the pointed tip curved backwards, 

 in bands of about three rows in both jaws. Origin of anal 

 below 5th dorsal ray. Dorsal about twice as long as anal, rounded 

 in females. In males the 2<* 4th ra y are enlarged, much 

 longer than the others. Last rays of anal smaller than the 

 anterior ones. In males the 6 th and ^th ray swollen and enlarged. 

 Pectorals about equal to head without snout. Ventrals shorter 

 than postorbital part of head, nearly or quite twice nearer 

 to caudal than to branchial opening. Caudal obtusely rounded. 

 Colour of preserved specimens brownish, with a silvery lateral 

 band, especially conspicuous below dorsal and on tail. Fins 

 hyaline. Length 180 mm. [Several specimens of BLEEKER'S 

 collection in the Leiden Museum examined by us]. 



Habitat: Singapore; Sumatra (Palembang, Banjuasin); Java 

 (Surabaya); Borneo (Banjermassin, Samarinda!, river Riko!, 

 river Baram); Madura. Siam, Hongkong, Burma, Australia? 

 (Port Darwin [Macleay] ). 



In rivers and estuaries. 



3. Zenarchopterus rasori (Popta) 



Hcmiramphus rasori Popta, Notes Leyden Mus. XXXIV. 1912, p. 192. 



D. II; A. 9 ; P. 9; V.6; L. 1. 40. 



Compressed, the breadth of the body going i 3 / 5 in its height. 

 Height S l / 2 in length without lower jaw '). Head from tip of 

 upper jaw 3.25 in trunk. Eye 1.8 in postorbital part of head 

 and almost 1.3 in interorbital space. Triangular part of upper 

 jaw i 2 / 7 times as long as broad. Praeorbital rounded, half as 

 long as eye. Bands of small teeth in the jaws. Origin of anal 

 opposite 4th dorsal ray. Base of anal 3 5 / 7 times in that of 

 dorsal. Anal without modified rays in the single specimen known. 

 Pectorals somewhat shorter than head without snout, longer 

 than postorbital part of head. Ventrals less than half length 



l) In the single specimen known the lower jaw is broken. 



