47 



Blkr. and of Dojyichthys Benisti'ini Blkr. from BleeKER's 

 collection in the Leiden Museum seen by us]. 



Habitat: North Borneo; Celebes (Menado, Makassar); Am- 

 bon, in fresh water!; Halmaheira; Dutch North New Guinea 

 (Tanah Merah Bay !, river Mamapiri !) ; German New Guinea. — 

 Island Samar, Queensland (Moreton Bay). 



Living in fresh and brackish water of rivers and their estuaries. 



3. Microphis boaja (Blkr.). 



Syngfiathiis boaja Bleeker, Nat. Tijdschr. Ned. Indie I. 1851, p. 16. 

 Syngnathus boaja Vevh. Batav. CJenootsch. XXV. 1853, Bijdr. Tioskieiuvige 



visschen p. 14. 

 Voryichthys spinosiis Kaup, Cat. Lophobr. Fish, 1856, p. 57. 

 Microphis boaja Bleeker, Act. Soc. Sc. Indo-Neeil. VIII. i860, 8. Bijdr. visch- 



fauna Sumatra, p. 63. 

 Microphis boaja Dumeril, Hist. nat. Poissons II. 1870, p. 593. 

 Doryichthys boaja Giinther, Cat. Brit. Mus. VIII. 1870, p. 180. 

 Doryichthys boaja Bleeker, Ned. Tijdschr. Dierk. IV. 1873, p. 126. 

 Syngnathus Jnllieni Sauvage, Revue et Mag. de Zool. (3) II. 1874, p. 338. 

 Doryichthys boaja Steindachner, Sitzber. Akad. Wien LXXXIII. 1881, p. 210. 

 Syngnathus zonatus Karoli, Termeszetrajzi Fiizetek V. 1882, p. 39. 

 Dorichthys boaja Volz, Zool. Jahrb. Abt. System. XIX. 1903, p. 411. 

 Dorichthys boaja Duncker, Mitt. a. d. naturh. Mus. Hamburg XXI. 1904, p. 188. 

 Microphis boaja Duncker, Mitt. a. d. naturh. Mus. Hamburg XXXII. 1915, p. 47. 



D. 47 — 61 ; A. 3 — 5; P. 23 — 27; Rings 21--24 + 34 — 40 ; sub- 

 dorsal rings 2 — 5 -{-G—j. 



Much elongate. Shields transversely striate, their edges not 

 serrated but terminating in a spine; the edges on the head 

 smooth. Inferior cristae of trunk and tail continuous; median 

 cristae of trunk and superior cristae of tail subcontinuous, gene- 

 rally completely interrupted on the last ring of the trunk (fig. 17, 

 n°. 8). Operculum with a complete longitudinal keel and some 

 radiating ridges below it. Head 4^4 — 5 "2 ""• lt;ngth; tail longer 

 than trunk; snout long, compressed, more or less than twice 

 the length of the remaining part of the head. Caudal shorter 

 than postorbital part of head. Greenish, yellowish below, tail 

 getting blackish posteriorly; on snout and vertex irregular 

 black patches; on the trunk and on the anterior part of the 

 tail vertical bands corresponding with the shields, silvery — 

 at least in their front- and hindborder — in preserved speci- 

 mens, blue in life. Length 430 mm. |A specimen ofBLEEKER's 

 collection seen by us]. 



