55 



incompletely or completely interrupted subdorsally on the last 

 trunk- or the first tail-ring; eventually the cristae mediae of the 

 trunk are deflected to the inferior cristae of the tail, but they 

 don't unite. Operculum vaulted, with complete longitudinal keel 

 from which diverge more or less pronounced corrugated lines. 

 Head 7 times or more in length. Eye about 4.5 times in head, 

 about 2.3 times in snout. Length of snout equal to remaining 

 part of the head. The median keel of snout reaches to nostrils 

 and according to Peters even to occiput. Tail longer than trunk 

 and head. Caudal twice as long as eye. Reddish brown, later- 

 ally on the limit of the fourth to the penultimate ring of the 

 trunk a black spot on the median crista. Length 125 mm. 

 [Specimens of Micropliis ignoratus Vail, in the Leiden Museum 

 seen by us]. 



Habitat: Sumatra (DuNCKER); Borneo (Lake Danau Sriang, 

 river Sebruang: an affluent of river Kapuas !, river Mandai !, 

 upper course of Mahakkam !). — Malay Peninsula, 



In fresh water of lakes and rivers. 



Doubtful species. 

 Doryichthys fluviatilis (Blkr.j. 



Syngnathus fluviatilis Bleeker, Verh. Bat. Genootsch. XXV. 1853, Bijdr. Tros- 

 kieuwige Visschen, p. 18 (after an inedited figure of van IIasselt; ncc 

 Peters, 15er. Verhandl. Akad. Berlin, 1852, p. 685). 



Microphis fluviatilis Dumeril, Hist. nat. Poissons II. 1870, p. 598 (after Bi.eekek). 



Doryichthys fluviatilis Duncker, Mitt. a. d. naturh. Mus. Hamburg XXXII. 1915, 

 p. 55 (after Bleeker, nee Duncker, ibid. XXI. 1904, p. 188). 



D. 29; A. 4; Rings 18 — 19 + 32; subdorsal rings 3 — 4 + 4 — 5. 



Much elongate. Height about 18 — 19 in total length. Character 

 of cristae and operculum unknown. Head about 6^^ times in 

 length. Eye 6 — 7 times in head. Snout much longer (but less 

 than twice) than postorbital part of head. Tail, the caudal 

 included, slightly longer than trunk and head, but less than 

 twice longer than trunk alone. Colour greenish. Length 139 mm. 



Habitat: Java (Batavia, in fresh water). 



Note: This species is only known from the description of 

 Bleeker, made after an inedited figure of VAN Hasselt. It 

 has never been found again and is therefore rather dubious; 

 perhaps it is identical with D. dcokhatoides (Blkr.). 



In the Leiden Museum is a specimen (N°. 3852) collected 



