FRESH-WATER FISHES OF SlAM, OR THAILAND 251 



8b. No transverse rostral groove; scales above lateral line 9.5, predorsal 

 scales 14 ; a pair of dark spots on caudal peduncle above and below- 

 lateral line cheveyi 



7&. Rostral fold fringed ; scales above lateral line 4.5, predorsal scales 10. 



sinkleri 

 LAEEO DYOCHEILUS (McClelland) 



CypriniiS dyocheilus McClelland, 1839, pp. 268, 330, pi. 37, fig. 1 (Bramaputra 



River). 

 Varicorhinus dyocheilus Fowler, 1935b, p. 510, figs. 4, 5 (Old Chiengseu), 



This well-known Indian species, reaching a length of a meter, has 

 been detected in Thailand waters of the Salwin basin, in the Mekong 

 basin in Northern Tliailand, and also in the Central district. It was 

 first met with at Hangkraben, north of Ayuthia, in 1924. In a pond in 

 Tonburi, Bangkok, connected with the Menam Chao Phya, a fish 

 26,3 cm. long was taken May 13, 1925, and in the same pond a specimen 

 27 cm. long was taken May 17, 1932, and kept alive in a tank at the 

 office of the Siamese Bureau of Fisheries until July 14, 1932. 



One of the Bangkok specimens was compared with typical ex- 

 amples in the Indian Museum of L. dyocheilus from Hardwar and 

 Simla and found to differ somewhat therefrom in proportions, the 

 head being larger, the snout relatively shorter and less overhanging, 

 the eye larger, and other features that could represent individual 

 variation. A detailed comparison of specimens from Central 

 Thailand and India is desirable. 



The fish is not common in the Bangkok region but seems to be known 

 to the local fishermen, who call it pla hua (lotus fish) . 



LABEO CALBASU (Hamilton) 



Cyprinus calbasu Hamilton, 1822, pp. 297, 387, pi. 2, fig. 33 (Bengal). 



Of wide distribution in India, this species ranges to Burma, and 

 was observed by tlie writer in the Salwin in both Burmese and 

 Thailand territory in February 1932. The fish were being caught 

 by local fishermen on baited long lines thrown from the sandy bank 

 into the deeper parts of the river. A number of fish 40 to 50 cm. long 

 were examined and photographed. 



In India the species is reported by Day to reach a length of 90 cm. 



LABEO INDRAMONTRI, new species 

 FlGtTKE 46 



Description. — Depth 3.8 in standard length; depth of caudal pe- 

 duncle 1.4 in its length and 2 in length of head; head somewhat less 

 than 4 in length, its width over opercles less its depth and 1.7 in length ; 

 snout blunt, rounded, 2.4 in head, divided into central and lateral 

 lobes by a deep groove extended upward and forward from postlabial 



