D. 25— 31 ; A. 2—3; P. 14—18; C. 10; Rings 14—16+37—42; 

 subdorsal rings: 2»d or y^ — 7th or 9th caudal ring. 



Very slender. Trunk heptagonal, tail tetragonal. Shields with 

 transverse lines. Edges of shields more or less prominent, 

 smooth or slightly crenulated, those on the superior lateral 

 shields with a prominent longitudinal keel, continued on the 

 intermedial shields, which are transversely elongated. End 

 of median cristae of trunk strongly deflected on last ring of 

 trunk and first ring of tail to inferior cristae of tail but not 

 united with them. Superior cristae of tail reaching to 2nd or first 

 ring of tail and here deflected to median cristae, but not 

 coalescing with them. Head about 7 — 10 times in length, low 

 but slightly and very gently gaining in height from point 

 of snout to occiput, which is only slightl}^ lower than highest 

 part of trunk. Occiput with more or less rough transverse 

 lines. Snout longer or much longer (but less than twice) than 

 postorbital part of head '), slender, more or less concave, com- 

 pressed, with a smooth low median keel getting lower on 

 front, from where it may be continued on occiput and nape, 

 gaining in size. Operculum with a complete longitudinal keel 

 from which radiate dorsally and ventrally numerous conspicuous 

 oblique lines. Eye about 6 — 7 times in head. Tail more than 

 twice, but less than thrice, longer than trunk. Dorsal inserted 

 exclusively on tail, in most cases on the second to the seventh 

 ring. Grayish brown or greenish. Trunk ventrally with 13 — 15 

 narrow white cross-bars, separated on the corresponding rings 

 by much broader black cross-bars. Operculum with or without 

 black lines or patches. Snout ventrally with black points and 

 markings. All the specimens without the black and white 

 cross-bars on trunk, but with a dark cross-band between the 

 neighbouring rings, have on the tail, far distant from each 

 other, 5 — 6 white cross-bands. Length 154 mm. [A specimen 

 of J>. gastrotaenia Blkr. of Bleeker's collection seen by us 

 as also of 5. Hunni Blkr. and a young specimen of S. tapei- 

 nosoma Blkr. of Bi.EEKER's collection in the Leiden Museum]. 

 Habitat: Singapore ; Sumatra (Samangka Bay, fresh water) • 

 Simalur!; Java (Anjer); Celebes (Makassar, Pare Pare!, River 

 near Balangnipa !) ; Island Kajoa; Buru ; Ambon; Ternate ; 



l) Steindachner calls it in his 5. gracilis somewhat shorter than postorbital 

 part of head, but in his figure it is drawn as considerably longer. 

 Indo-austrai-fan fishes IV. 6 



