82 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



collected by E. Havmoller in September 1926 in a tributary of the 

 Poom Duang River, in Chaiya Province, Peninsular Thailand; this 

 specimen was presented to the Siamese Bureau of Fisheries. 



It is believed that Laubuca siamensis, based on three specimens 4.2 

 to 6 cm. long from a waterfall stream near Trang, is the present spe- 

 cies. In the comparison of L. siamensis with Chela laubuca made by 

 Fowler, stress was laid on the slender body of the former (depth 3.2 

 to 3.5, 3 in figure) as compared with Day's account of C. laubuoa from 

 India and Burma (depth 2.75 in figure, 3.5 to 4.25 in length with 

 caudal fin). Weber and de Beaufort (1916, vol. 3), however, gave 

 the depth in the standard length of G. laubuca as 3.2 to 3.6 ; and they 

 described the ventral and pectoral fins as noted by Fowler and showed 

 the squamation, fin rays, and coloration in almost perfect agreement 

 with L. siamensis. 



Genus LONGICULTER Fowler 



Longiculter Fowler, Proc. Acad. Nat. Sci. Philadelphia, vol. 89, p. 162, 1937. 

 (Type, Longiculter siahi Fowler.) 



In establishing the genus Longiculter to accommodate L. siahi, 

 Fowler wrote: "Differs from Culter and related genera in its well- 

 elongated and strongly compressed body." The genus must rest, 

 however, on other characters, because in neither of those mentioned 

 is it at all peculiar; a greatly compressed body being typical of the 

 cultrid fishes, and this particular fish being no more elongate than 4 

 or 5 local cultrid forms described by Fowler as new species. Appar- 

 ently the genus should be based chiefly on the biserial pharyngeal teeth 

 and the extremely numerous gill rakers (106 on the first gill arch) 

 together with a combination of characters shared with related cultrid 

 genera. 



LONGICULTER SLAHI Fowler 



Longiculter sialU Fowler, 1937, p. 162, fig. 100 (Mepoon). 



This species was described from two specimens, 20 and 19.8 cm, long, 

 taken at Mepoon, Central Thailand. 



Genus PARALAUBUCA Bleeker 



Paralaubuca BlEekee (301), Atlas ichthyologique, vol. 3, p. 133, 1863. (Type, 

 Paralaulmca typus Bleeker.) 



This genus was established for the accommodation of a new fish 

 collected in Thailand by Dr. F. Bocourt. The genus dates from 1863, 

 when Bleeker (301) gave a brief diagnosis, with indication of the type 

 species, in a footnote in volume 3 of the Atlas Ichthyologique. A 

 full description of the genus and the species was published by Bleeker 

 (344) in 1865) from which Jordan (1919, pt. 3, p. 335) dated the genus. 



