54 



Dorkhthys deokhatoidcs Volz, Kevlie Suisse Zool. XII. 1904, p. 483. 

 Dory'uhthys deokhatoidcs Duncker, Milt. a. d. ^aturh. Mus. Hamburg XXXII. 

 1915, P- 53- 



1^- 30—35; A- 3—4; I'- 18—23; C. 8— 10; Rings 17—20 + 

 31 — 35; subdorsal rings i — 2+4 — 6. 



Much elongate. Height about 16 — 20 times in total length, 

 higher than broad. Shields transversally striated, the edges 

 finely serrated when young, smooth in adults. Intermedial shields 

 (scutella) smooth. Ventral crista very prominent. Inferior 

 cristae of trunk and tail continuous. Median cristae of trunk and 

 superior cristae of tail subcontinuous, as the end of the median 

 cristae runs somewhat below the superior cristae of the tail and 

 reaches the last trunk-or first tail-ring. Operculum with a pro- 

 minent complete longitudinal keel, but without radiating ridges. 

 Head 57-2 — ^'/o times in length. Eye 6Y2 — 7 times in length 

 of head, about 4 times in snout. Snout about twice the length 

 of the postorbital part of the head or equal to the distance 

 from the frontmargin of the eye to the base of the pectoral. 

 Tail, the caudal included, somewhat longer than trunk and 

 head. Greenish, ventrally darker; laterally on the trunk, at 

 the limits of about the sixth to the fourteenth ring in the 

 superior crista a dark patch. A narrow dark band on snout 

 through eye to hindborder of operculum. Length 175 mm. 

 [A specimen of Bleeker's collection seen by us]. 



Habitat: Sumatra (Palembang, Laut Tador; Medan !) ; 

 Borneo (Pontianak, Sadong). — Malay Peninsula. 



In fresh water of rivers and brooks. 



6. Doryichthys martensi (Ptrs.). 



Syngmitlms Marieiisii Peters, Monatsber. Akad. Berlin (1868) 1869, p. 459. 



Sy/tg/iathiis Martensii Dumeril, Hist. nat. Poissons II. 1 870, p. 560. 



Microphis caudatiis^. Vaillant, Nouv. Arch. Mus. Hist. nat. (3) V. 1893, p. 62 



(nee Peters 1869). 

 Microphis ignoratus Vaillant, Notes Leyden Mus. XXIV. 1902, p. 40. 

 Doryichthys (Microphis) ignoratus Popta, Notes Leyden Mus. XXVII. 1906, p. 211. 

 Doryichthys Martensi Duncker, Mitt. a. d. naturh. Mus. Hamburg XXXII. 191 5, p. 53. 



D. 31—36; A. 3— 4; p. 16— 20; C. 9; Rings 15—17 + 33—37; 

 subdorsal rings i — 2 + 5 — 7. 



Shields transversally striated or corrugated, the keels smooth. 

 Inferior cristae of trunk and tail continuous. Median cristae of 

 trunk and superior cristae of tail subcontinuous, as both are 



