FRESH- WATER FISHES OF SIAM, OR THAILAND 157 



Other speci7ne7u. — A further lot of specimens collected by Deignaii 

 in the Menam Kon, a branch of the Menam Nan, April 21, 1936, con- 

 sists of six fish 8.3 to 8.8 cm. long. They are typical in showing two 

 to three sharply defined black vertical stripes anteriorly, with the 

 posterior spots more or less indistinct. 



Referable to this species are specimens in the Deignan collection, 

 5.5 and 4.8 cm. long, taken in the gorge of the Mechem in Northern 

 Thailand, July 1935, by A, K. Buchanan and P. D. Harrisson, of 

 Chiengmai. 



Remarks. — This is one of the smallest of the known species of 

 Barilius of Thailand, Burma, and India, the females reaching full 

 sexual maturity when only 6.2 cm. long. 



Its relations with other local species are shown in the preceding 

 key. It is distinguished by a combination of characters shared by 

 other species and by several peculiar features, including the colora- 

 tion of the dorsal fin with each branched ray black basally, the extent 

 of the blackish coloration increasing from before backward, so that 

 the last ray is almost entirely blackish. 



The paratypes agree very closely with the type in all details of 

 structure, with slight variations that are to be expected. Thus, the 

 tube-bearing scales of the lateral line number 32 to 34, the predorsal 

 scales 17, the scales surrounding the caudal peduncle uniformly 14, 

 and the branched anal rays uniformly 10. 



BARILIUS HUAHINENSIS Fowler 



Barilius MahineMsis Fowler, 1934b, p. 347, figs. 9, 10 (Ban Thuiig Luang). 



Known from many specimens, the largest 9.1 cm. long, from Ban 

 Thung Luang, near the seaside resort of Hua Hin, on the west coast 

 of the Gulf of Siam. 



The coloration of young and adult is peculiar in showing 12 to 14 

 narrow black vertical stripes along side, a straight black median 

 stripe from head to base of caudal fin, and, in the adult, about 4 

 curved, parallel dark lines on the back formed by a spot at the base 

 of each scale. The adult has both rostral and maxillary barbels; the 

 young appears to lack the maxillary pair. 



BARILIUS PULCHELLUS H. M. Smith 



Barilius pulchellus Smith, 1931a, p. 17, fig. 8 (Mekang). 



Barilius buddhae Fowler, 1934a, p. 142, fig. 116 (Chiengdao, Chiengmai). 



Described from four specimens taken from the Mekang at Pang 

 Chao, on Doi Angka, Northern Thailand, on December 1, 1928, this 

 species has been found to be abundant in various other waters in the 

 drainages of the Menam Pino; and the Menam Kong. The collection 



