266 BULLETIN 18 8, UNITED STATES NATIONAL MUSEUM 



Although lacking the striking markings of the fins in E. kalopterus^ 

 this species has very attractive living colors: Back and sides green, 

 with flecks of light blue or purple; top of head bright green; lateral 

 band from head to tip of middle caudal rays black, with a silvery band 

 below; underparts white; dorsal, caudal, and pectoral fins very pale 

 green, anal and ventral fins hyaline. The type specimen had its snout, 

 top of head, and upper lip thickly beset with low papillae. 



The local fishermen give it a name, pla lab Ttiue nang (lady's finger- 

 nail fish) , borne by no other fish, say it is good to eat and that it gets 

 no larger than the type, which is 13.8 cm. long. 



Figure Sl.—Epalzeorhynchos siamensis H. M. Smith. Drawn by Luang Masya; courtesy 



of the Thailand Government. 



EPALZEORHYNCHOS COATESI (Fowler) 



Tylog'natJius coatesi FowLEai, 1937, p. 208, figs. 181, 182 (Bangkok) ; 1939, p. 72 

 (Trang). 



This species was first observed in Thailand in November 1923 when 

 four specimens were obtained in Bung Borapet. In 1926, 1927, and 

 1934 it was taken at several points in the Menam Mun both east and 

 west of Korat, and in 1929 a specimen was secured at Pong, on the 

 Pong River, a tributary of the Mun. In 1925 the fish was collected in 

 Lam Tong Lang, northwest of Pakjong, and in 1927 R. Havmoller 

 sent in specimens from Klong Chawang, near Kao Nong, in Peninsu- 

 lar Thailand. The Deignan collection contains specimens from the 

 Menam Nan. The fish is thus of wide distribution but does not appear 

 to be common anywhere. 



The type, Tylognathus coatesi^ was characterized as having, among 

 other characters, a pair of rostral barbels and no maxillary barbels (a 

 feature apparently not known in any species of Tylognathus), upper 

 lip continuous with the rostrum and having 16 plicae forming a fringe, 

 together with a nearly plain coloration except for a large round well- 



