116 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



1923. It is common in waterfall pools on Koh Chang, and in various 

 waterfall streams on Kao Sabap, near Chantabun. The first pub- 

 lished record of the fish for Thailand is that of Luang Masya Chitra- 

 karn and Boon Chuay Indrambarya, of the Siamese Bureau of Fish- 

 eries, who collected specimens in swift brooks on Koh Samui and Koh 

 Pa-ngan in May 1931. A further locality from which specimens have 

 been examined is a stream 20 miles west of the railway station of Ban 

 Hoi Toi in Chaiya Province, Peninsular Thailand. It is suggested 

 that the two very young specimens collected on Koh Chang and listed 

 by Hora as R. argyrotaenia may have represented this species, which 

 is the only one met with in extensive collecting on that island. 



RASBORA LATERISTRIATA SUMATRANA (Bleeker) 



Leuciscus sumatranus Bleekee, 1852 (67), p. 601 (Solok, Sumatra). 

 Rashora lateristriata sumatrana Hoea, 1924a, p. 469 (Tale Sap). 



Previously known from Borneo, Nias, Sumatra, and the Malay 

 Peninsula, in 1924 this fish was reported by Hora from the inner lake 

 of the Tale Sap where several specimens, none over 25 mm. long, were 

 collected. There are no other local records. 



This variety of R. lateristriata is poorly distinguished from the 

 typical form by a few less scales in the lateral line which "may de- 

 crease to 24" (as against 26 to 30 in the typical form) ; by the very 

 narrow blackish lateral band, sometimes reduced to a mere line, end- 

 ing in a roundish black spot anterior to the caudal base; in older 

 stages only the precaudal spot exists. 



RASBORA LATERISTRIATA TRIFASCIATA Popta 



Rasbora trifasciata Popta, 1905, p. 176 (The Bo, Central Borneo). 



Examples of Rasbora lateristriata from Northern Thailand and 

 other parts of the country resemble the color phase called R. I. tri- 

 fasciata^ described from rivers of Borneo, in having on the median 

 lower edge of the caudal peduncle a black stripe, which divides at 

 the anal fin and continues forward on each side of the anal base, be- 

 coming wider anteriorly. In some specimens the stripe on the lower 

 caudal peduncle is very faint or altogether absent and the line at 

 the base of the anal may be reduced to an elongate spot anteriorly. 

 This spot corresponds with, but does not closely resemble, the round 

 spot met with in some specimens of typical R. lateristriata. 



RASBORA CHERONI Fowler 



Rasbora cheroni Fowler, 1937, p. 168, fig. 104 (Pitsanulok). 



Described from a single specimen, 9.7 cm. long, this species is close to 

 R. lateristriata and may be a variant of that very inconstant species. 



