112 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



between the posterior margin of the eye and the last tubule-bearing 

 scale of the lateral line, and in several other specimens is midway be- 

 tween the preopercle and the terminal lateral-line scales; and the fin 

 arises over the fourteenth scale of the lateral line. The tubule-bearing 

 scales in the lateral line number 34 or 35, as against 29 or 30 in typical 

 R. argyrotaenia. The circumpeduncular scales are usually 16, some- 

 times 14, as against 12 in R. argyrotaenia. 



This form is close to and may prove to be the same as Rasbora diiso- 

 nensis Bleeker from Borneo and Sumatra, synonymized with R. argy- 

 rotaenia by Giinther and by Weber and de Beaufort. Apparent dif- 

 ferences between R. argyrotaenia and R. dusonensis are in the more 

 advanced position of the dorsal fin (its origin in the latter form, ac- 

 cording to Bleeker's plate (301) (1863, vol. 3, pi. 120, fig. 1) , being mid- 

 way between the front margin of the eye and the last scale of the lateral 

 line and over the fourteenth or fifteenth scale of the lateral line), in 

 the greater number of lateral-line scales (32 to 36 according to 

 Bleeker's description and 36 in his plate), and in the greater intensity 

 and sharper demarcation of the black edge of the caudal fin. 



RASBORA TRILINEATA Steindachner 



Basiora trilineata Steindachner, 1870, p. 637 (Johore; Pengulon Patie).— 



HoBA, 1924a, p. 469 (Tale Sap). 

 Rasbora stigmatura Fowlek, 1934b, p. 341, fig. 5 (Krat). 



Hora (1924a) added this species to the known fauna of Thailand by 

 reporting three specimens 25 mm. long taken in the inner lake of Tale 

 Sap. Prior to that time it was ascribed only to Borneo and Sumatra. 

 In 1929 the fish was found at 1,000 feet elevation in a mountain stream 

 on Kao Sabap, and in 1932 it was discovered to be common in Bung 

 Borapet, whence live specimens were taken to Bangkok in October. 



A length of 15 cm. is reached by this fish in the Dutch East Indies, 

 but the largest Thailand specimens examined have been under 6 cm. 



Color note on living specimens of R. trilineata taken in Bung Bora- 

 pet September 26, 1932: Back pale green, center of scales darker; 

 midside silvery, overlain by a broad diffuse blackish band from head 

 to base of caudal peduncle, with a narrow silvery stripe above it ; ab- 

 domen, lower side, and under part of head dusky ; dusky areas on side 

 of snout and upper half of opercle ; a jet-black line on each side above 

 the base of the anal fin, the two lines joining behind the fin and extend- 

 ing to the caudal along the lower edge of peduncle ; an incomplete very 

 thin black line before and behind the dorsal ; dorsal rays pale greenish 

 yellow, membranes hyaline ; basal two-thirds of caudal fin pale yellow, 

 a large subterminal blue-black spot on each lobe, edge of lobe white, 

 median rays black (as from extension of black lateral band) ; anal, 

 ventral, and pectoral fins hyaline, with a few minute black dots on the 

 membranes. 



