

line running along the middle of the tail. Pharyngeal teeth 

 4.3.2 2.3.4, cuneiform, aggregate. Gillmembranes broadly united 

 to the isthmus. Gillopenings reaching to below hindborder of 

 praeoperculum. 



Distribution: Fresh water of Sumatra, Borneo; Siam. 



Key to the species. 



* 3V2 (4) scales between lateral line and ventrals. 



51(6) 

 L. tr. i A. truncatus p. 105. 



~5f~ _T_ 



2. 5 scales between lateral line and ventrals. L. tr. I . . . A. altus p. 106. 



i. Amblyrhynchichthys truncatus (Bleeker). 



Barbtis truncatus^ Bleeker, Nat. Tijdschr. Ned. Indie I. 1850, p. 13. 

 Systomus truncatus Bleeker, Nat. Tijdschr. Ned. Indie II, 1851, p. 60. 

 Amblyrhynchichthys trimcatus Bleeker, Ichth. Arch. Ind. Prodr. II. Cyprini, 1860, 



P- 33- Atl. Ichth. III. 1863, p. 114. 

 Amblyrhynchichthys truncatus Giinther, Cat. Brit. Mus. VII. 1868, p. 159. 



5K6) 

 D. 4.8(9); A. 3.5; P. 1. 15; V.2. 9 ; L.I. 35 37; L. tr. t . 



5* 



Stout, oblong, back strongly ascending from snout, to dorsal. 



Height 2.8 3, 3.4 3.7 in length with caudal. Head 4.2 4.4, 

 5.2 in length with caudal, almost as high as long. Eye from 

 more than 2 ! / 2 to nearly 3, about equal to interorbital space 

 and about twice as long as snout, which is very blunt and 

 somewhat prominent before the arched mouth. Vertical through 

 origin of dorsal running through about the II th scale of lateral 

 line, and nearer to end of snout than to caudal and one scale 

 behind origin of ventrals. Dorsal concave, its fourth ray strongly 

 ossified, exceedingly strong and evenly serrated behind, much 

 longer than head. Base of dorsal in a scaly sheath. Anal concave, 

 its third spine weak, somewhat more than half head. Ventrals 

 about equal to pectorals, separated by s'^W sca l es from the 

 lateral line, far distant from anus. Pectorals about 4 / 5 of head. 

 Caudal deeply emarginate, the lobes rounded, shorter than head. 

 Least height of caudal peduncle 3 / 5 of its length, equal to half 

 head or somewhat more. 16 scales round caudal peduncle, 7 

 of which above the lateral lines. Scales with converging longi- 

 tudinal sinuous lines. Colour of alcohol specimens silvery, 

 back dark, with longitudinal shining lines corresponding to 



