FRESH-WATER FISHES OF SIAM, OR THAILAND 109 



Coloration : Back and top of head pale greenish ; lower part of body 

 and head white ; lower part of opercle bright silvery ; a narrow sharply 

 defined black band from eye to base of caudal fin continued as a faint 

 stripe on median caudal rays; the black band bordered above by a 

 pale golden band from eye to caudal fin, its upper margin on level with 

 upper edge of eye; an indistinct brownish median dorsal stripe from 

 head to caudal base interrupted at dorsal fin ; all fins hyaline. 



Type. — The type and only known specimen (U. S. N. M. No. 107956) 

 is a male, 5.6 cm. long, with large gonads, taken in Bung Borapet, 

 Central Thailand, December 4, 1932. 



Remarhs. — ^With its incomplete lateral line and black longitudinal 

 stripe, this species resembles R. horapetensis] its differences, however, 

 are marked, including less pointed head, shorter lower jaw with its 

 tip on level with lower part of pupil (tip of lower jaw on level with 

 upper edge of eye in R. horapetensis) , more scales around the nar- 

 rowest part of the caudal peduncle (14 instead of 12) , more perforated 

 scales of lateral line (23 instead of a maximum of 14), extension of 

 the black longitudinal band to the eye (instead of its restriction to 

 body), and absence of black lines at base of anal and on underside 

 of caudal peduncle (these conspicuous in R. horapetensis) . 



RASBORA ARGYROTAENIA (Bleeker) 

 FiGtIRE 11 



Leuciscus argyrotaenia Bleekee, 1850 (25), p. 21 (Banjnmas, Gombong, Pur- 



woredjo, and Surabaya, Java). 

 Rasbora dusonensis Bleeker, 1859-60 (239), p. 102 (Siam) ; 1865 (356), p. 176 



(Siam).— Sauvage, 1881, p. 164 (Siam) ;' 1883b, p. 153 (Menam Chao Phya). 

 Rashora argyrotaenia von Martens, 1876, p. 403 (Bangkok). — Karoli, 1882, p. 



180 (Siam). — Webee and de Beaufort, 1916, vol. 3, p. 61 (Siam). — Hoea. 



1923b, p. 152 (Koli Chang) ; 1924a, p. 469 (Tale Sap) .— Fowlek, 1934a, p. 113 



(Chiengmai, Chiengsen) ; 1937, p. 169 (Bangkok, Tachin, Mepoon, Kemarat) ; 



1939, p. 44 (Krabi). 



In addition to its wide range in the East Indian Archipelago, this 

 species is known from Malaya and Annam as well as Thailand. It 

 occurs over a large part of the country and in great abundance. Fowler 

 records it for the Meping Basin at Chiengmai and from points on the 

 Mekong on the northern and eastern borders of Thailand ; the writer's 

 collecting has disclosed it in the Mekong at Ban Tai, Province of 

 Udon, throughout the Menam Chao Phya from Paknampo to Bang- 

 kok, in Bung Borapet, in the Bangpakong, in the Kanburi near Kan- 

 buri, in Klong Sao Tong (Nakon Sritamarat), and in Tale Noi. The 

 collections made by Deignan extended the known range to the head- 

 waters of the Nan River. Specimens in the British Museum presented 

 by the Siamese Museum are from the Menam Chao Phya and the upper 

 Bangpakong. 



