14. ABROSTOMUS. 67 



very small barbels only. Eye of moderate size, situated somewhat 

 behind the middle of the length of the head. There are three lon- 

 gitudinal series of scales between the lateral line and the root of the 

 ventral fin. The height of the body is contained thrice and three- 

 fourths in the total length (■without caudal), the length of the head 

 five times. Origin of the dorsal fin in advance of that of the ventral, 

 opposite to the tenth scale of the lateral line. Anterior dorsal rays 

 more or less prolonged in adult examples. Caudal fin deeply forked. 

 Coloration uniform. 

 Java. 



a. Adult. From Dr. Bleeker's Collection. 



10. Tylognathus heterorhynchus. 



Lobocheilus heterorhynchos, Bleek. Nat. Tydschr. Ned. Ind. v. p. 524. 

 Scliismatorhynchus lieterorhynclius, Bleek, I. c. ix. p. 2G9 ; or Prodr. 



Cypr. p. 131; or Atl. Ichthijol. Cypr. p. 50, tab. 4. fig. 4. 

 lobocheiloides, Bleek. Nat. Tydschr. Ned. Ind. xiv. p. 476. 



D. 11. A. 7. L. lat. 33. L. transv. 5^/6. 



Mouth transverse, broad; upper and lower jaws with well-deve- 

 loped lips, which are separated from each other by a deep incision 

 behind each angle of the mouth, a piece of skin lying in the same 

 incision and forming a kind of communication between the two lips. 

 The lower jaw with sharpish margin. Maxillary part of the snout 

 with a thick, triangular enlargement of the skin, separated behind 

 from the forehead by a deep transverse groove. Snout much pro- 

 jecting, the lower jaw without lateral lobes, slightly porous above. 

 Barbels four, longer than the eye. Eye veiy small, situated a little 

 behind the middle of the length of the head. There are three lon- 

 gitudinal series of scales between the lateral line and the root of the 

 ventral fin. The height of the body is contained thrice and three- 

 fourths in the total length (without caudal), the length of the head 

 four times and two-thirds. Origin of the dorsal fin in advance of 

 that of the ventral, opposite to the ninth scale of the lateral line. 

 Anterior dorsal rays more or less produced in adult examples. 

 Caudal fin deeply forked. A blackish band runs along the middle 

 of the side. 



Sumatra and Java. 



a. Typical specimen. From Dr. Bleeker's Collection. 



14. ABROSTOMUS. 



Abrostomus, Smith, Zool. S. Afr. Pisces. 

 Scales small. Dorsal fin without osseous ray, with not more than 

 nine branched rays, commencing nearly opposite to the vcntrals. 

 Snout obtusely rounded, rather thickened, and projecting beyond the 

 mouth ; mouth inferior, transverse, with pulpy lips, which are con- 

 tinuous and not fringed, the lower one with a membranous fold 

 internally like a second lip ; barbels four, small. Anal scales not 



f2 



