m. cnT.jA. 387 



extcndiiif^ to the front margin of the orbit. Mandible with the 

 symphysis distinctly hooked. Suborbital ring narrow. The scales 

 of the nape advance to above the front margin of the orbit. Lateral 

 line descending gradually in a slight curve towards the ventral fin. 

 Origin of the dorsal fin a little in advance of that of the anal. Pec- 

 toral fin exceedingly long, one-third of the total length (without 

 caudal), extending to the middle of the space between ventrals and 

 anal. Thorax compressed into a sharp edge supported by the dilated 

 bones of the forearm. Yentral fins small, inserted somewhat above 

 the abdominal profile. Uniform silverj-. 



The middle of the hind margin of the gill-membrane is in front 

 of the angle of the pra?operculum. 



Siam. 



a. Four inches long. Pachebon (3*[ouhot). Purchased of Mr. 

 Stevens. 



13. Chela megalolepis. 



Leuciscus oxyga?ti'oides, Bleek. Nat. Ti/dschr. Ned. hid. iii. p. 432. 

 Chela oxvgastroides, Bleek. Cypr, Prodi: p. 472 ; or Atl. Ichth. Ch/pr. 

 p. 1.3.5,' tab. 42. fig. 4. 



D. 9. A. 30-33. V. 7. L. lat. 40. L. transv. 6/.5. 



The height of the body is two-sevenths of the total length (with- 

 out caudal), the length of the head two-ninths. Snout a little shorter 

 than the eye, the diameter of which is two-sevenths of the length of 

 tlie head. ^Mouth very oblique, rather narrow, the maxillary- not 

 extending to the front margin of the orbit. Mandible with the 

 sjTuphysis distinctly hooked. Suborbital ring very narrow. The 

 scales of the nape advance to above the front margin of the orbit. 

 Lateral line descending gradually in a very slight curve towards the 

 ventral fin. Origin of the dorsal fin opposite to that of the anal. 

 Pectoral fin exceedingly long, two-sevenths of the entire length of 

 the fish, nearly extending to the anal. Thorax comjjressed into a 

 sharp edge supported by the dilated bones of the forearm. Yentral 

 fins small, inserted somewhat above the ventral profile. A blackish 

 band along each caudal lobe. 



Pharyngeal teeth 5.4. 2 — 2 .4.5. The middle of the hind 

 margin of the gill-membrane is opposite to the angle of the pras- 

 operculum. 



Java ; Sumatra ; Borneo. 



«. One of the typical examples. From Dr. Bleeker's Collection. 



14. Chela paralaubuca. 

 Paralaubuca tj-pus, Bleek. Ned. Ti/dschr. Dierk. ii. p. Ki. 



12-14 



D. 9. A. 31-32. L. lat. ca 53. L. transv. ^r-r. 



The height of the body is one-third of the total length (without 

 caudal), the length of the head two-ninths. Snout much shorter 

 th:in the eye, the diameter of which is two-fifths, or somewhat less, 

 of the length of the head. The maxillary does not extend to the 



VOL. VII. z 



