FRESH-WATER FISHES OF SUM, OR THAILAND 299 



Type and par aty pes. — The type (U.S.N.M. No. 107952) is a female, 



6.1 cm. long, with well-developed eggs, taken January 28, 1932, in 

 the Meping, north of Chiengmai, Northern Thailand. A specimen 

 4.9 cm. long was taken at the same time and place. A third specimen 



5.2 cm. long was collected by H. G. Deignan April 28, 1935, in the 

 Meping at Chiengdao. Paratypes bear the following U.S.N.M. num- 

 bers : 109751, 109752. 



Remarks. — This species resembles Acanthopsis choirorhynchos 

 (Bleeker), but has a less elongate and more decurved snout, more 

 advanced position of the eye, different position of the bifid preorbital 

 spine, incomplete lateral line, different shape of the caudal fin, and 

 different coloration. 



As far as is known at present, the fish inhabits only the upper 

 Meping. 



Genus ACANTHOPHTHALMUS van Hasselt 



Acanthophthalmus van Hassext, Alg. Konst. Letterbode, vol. 2, p. 132, 1823. 

 (Type, Acanthophthalmus fasciatus van Hasselt.) 



This genus is sparsely represented in Thailand as regards both 

 species and individuals. One of the two species thus far recorded 

 is known only from Peninsular Thailand, the other has been found 

 only in Southeastern Thailand. The two may be readily distin- 

 guished by their coloration and by the following features : 



la. Body and head uniform reddish brown, lighter below ; dorsal fin terminating 

 the length of its own base in advance of anal fin javanicus 



1&. Body and head with 12 to 15 alternating cross bands of red and black ; dorsal 

 fin terminating over or very slightly in advance of anal fin kuhlii 



ACANTHOPHTHALMUS JAVANICUS Bleeker 



Acanthophthalmus javanicus Bleeker, 1860 (265a), p. 75 (Java, Sumatra). '^ 

 This species has been recorded from Java and Sumatra. Its claim 

 to a place in the Thailand fauna rests on a single diminutive specimen, 

 2.5 cm. long, taken by the author in Nam Tan Boh, a mountain brook 

 in the Patalung district of Peninsular Siam, July 8, 1929, and on 11 

 specimens, 3.3 to 5.3 cm. long, taken by H. G. Deignan in the Menam 

 Kon, a branch of the Menam Nan, at Ban Khana, Northern Thailand, 

 April 20, 1936. These specimens agree very well with the description 

 and figure of Bleeker, who records a length of 8.1 cm. 



Weber and de Beaufort regarded A. javanicus as a synonym of A. 

 pangla (Hamilton) from India and Burma. In this conclusion the 

 present author cannot concur. If the figure of the A. pangia given 

 by Day is at all accurate, it has the dorsal base about 2.5 times 

 its length in advance of the anal and the origin of the ventral 

 fins much nearer to the tip of the snout than to the base of the caudal 



