FRESH-WATER FISHES OF SIAM, OR THAILAND 



253 



Tyfe. — The type and only known specimen (U.S.N.M. No. 107964) 

 is 12.4 cm. long. It was taken in Bung Borapet, Central Thailand, 

 November 24, 1933. 



Remarks. — At the time the type specimen was captured it was 

 recognized as peculiar, and additional specimens were sought during 

 many years. The species may be distinguished from the described 

 Thailand and Indian species by a combination of characters, includ- 

 ing rather small scales, two pairs of barbels, curiously papillate lower 

 lip, and apparently small size, for the type is a female with ovaries 

 extending the entire length of the abdominal cavity. 



Named for Phya Indra Montri, for many years president of the 

 Siam Society, in appreciation of his untiring labors in extending the 

 knowledge of the history, culture, and natural resources of Thailand. 



LABEG BICOLOR H. M. Smith 



FiQtrRE 47 



Labco bicolor Smith, 193ia, p. 9, fig. 4 (Menam Chao Fhya).— Fowlek, 1934b, 

 p. 347 (Silom Canal, Bangkok) ; 1937, p. 201 (Tachin River). 



This was the first species of Laheo to be recorded from Thailand. 

 It is known only from the Central region and its center of abundance 

 appears to be the Menam Chao Phya basin in the region of Paknampo. 

 It is probably the commonest fish of this genus in Thailand. 



Figure 47. — Labeo bicolor H. 



M. Smith. Drawn by Luang Masya; courtesy of the 

 Thailand Government. 



This is a comparatively small species. The largest specimens ob- 

 served have been only 12 cm. long, and full maturity is reached between 

 7 and 8 cm. Thus, two specimens 7.4 and 7.5 cm. long, taken in Bung 

 Borapet, Central Thailand, March 1933, had ovaries extending as 

 far as the base of the pectoral fins. 



