3. HEMiRnAMPirtrs. 273 



30. Hemirhamphus pogonognatlius. 



Hemirhamphus pogonognathus, Bleeker, Nat. Tydschr. Ned. Ind. v. 



p. 193. 

 Hemirhamphodon pogonoguathus, Bleek. Nederl. Tydschr. Dierh. 



iii. p. 169. 



D. 17. A. 7. P. 9. V. 6. 



The length of the head is one-third of the total (with the caudal), 

 that of the snout one-fourth ; upper jaw longer than broad. Lower 

 jaw with an apical appendage which is as long as the eye ; the latter 

 equals the width of the interorbital space or the length of the postor- 

 bital portion of the head. Vertex Hat ; scales smallish. The ventrals 

 are inserted in the middle of the fourth sixth of the total length. 

 Caudal rounded. Brownish, fins blackish. {Bl.) 



Rivers of Banka and Biliton. 



a. Type of the species, in a bad state. From Dr. Blocker's Collection 



bb. Number of dorsal rays not much exceeding that of anal; dorsal Jin com- 

 mencing before or above the origin of the anal ; males with dorsal and 

 anal rays modijied : viviparous: Zenarchopterus (GjV^). 



31. Hemirliamplms amblyums. 



Henairharaphus amblyurus, Bleeker, Verh. Bat. Gen. xxiv. Snoek. p. 16. 

 bomeensis, Bleeker, Nat. Tydschr. Ned. Ind. ii. p. 68, and Ve^'h. 



Bat. Gen. xxiv. Snoek. p. 25. 

 bleekeri, Kner, Sitzgsber. Akad. Wiss. fFiVw, 1860, xxxix. p. 539, 



fig. 4 (male). 

 Zenarchopterus amblyurus, Bleek. Nederl. Tydschr. Dierk. iii. p. 160. 



D. 13. A. 10. P. 9. L. lat. 46. 



Head and body strongly compressed. The length of the head is 

 contained twice and a fifth in the total (without the caudal), that of 

 the snout twice and three-fourths, and that of the prominent part of 

 the lower jaw thrice ; upper jaw twice as long as broad, one-fourth of 

 the length of the prominent part of the lower. The diameter of the 

 eye is less than the width of the interorbital space, and less than 

 one-half of the length of the postorbital part of the head ; vertex 

 flat. The ventral fins are twice as remote from the angle of the 

 praeoperculum as from the root of the caudal. Caudal rounded ; 

 anal rays slightly dilated. Sides with a very indistinct silvery band. 



East-Indian archipelago and Siam. 



a. Five and a half inches long. Siam. From M. Mouhot's Collection. 



b. Type of the species. From Dr. Bleeker's Collection. 



32. Hemirhamphus buffonis. 



? Hemirhamphus buffbnis, Ciw. ^ Val. xix. p. 48. 

 Hemirhamphus buffonis, Bleek. Nat. Tydschr. Ned. Ind. iii. p. 711. 



striga, Blyth, Journ. As. Soc. Beng. 1859, xxvii. p. 288. 



Zenarchopterus buffonis, Bleek. Nederl. Tydschr. Dierk. iii. p. 162. 



D. 10-12. A. 10-12. L. lat. 42. 



The length of the entire head is one-half of the total (without 



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