142 BULLETIN 18 8, UNITED STATES NATIONAL MUSEUM 



local waters it is the commonest and most widely distributed species of 

 Cyclocheilichthys. It lias been found in the basin of the Menam Chao 

 Phya as far north as Mepoon (Fowler) ; at Chantabun, Krat, in a 

 mountain stream on Kao Sabap ; in upper waters of the Menam Tapi ; 

 in the Menam Tadi; in the Tale Noi; in the Menam Patani at the 

 town of the same name ; and on the western side of the peninsula near 

 Takuapa. 



Many of the fully grown males of C. apogon are strikingly colored 

 in life. At a trap at Hangkraben, off the Menam Chao Phya north 

 of Ayuthia, this fish was being caught in large numbers on December 

 11, 1924, the size ranging from 11.5 to 14.2 cm.; as they came from 

 the water they were generally silvery, with 10 or 11 very conspicuous 

 black longitudinal stripes from the pectorals to the caudal, the stripes 

 formed by a spot on each scale, and with a large round black spot on 

 the caudal peduncle at the end of the lateral line; the iris was blood 

 red; all fins were pale reddish; and the peritoneum was black. A 

 breeding male in high coloration taken in the upper Chantabun River 

 on June 11, 1926, was of a golden color, with the entire body marked 

 by jet black longitudinal stripes formed by a spot on each scale, a 

 large black spot on the caudal peduncle, dorsal and caudal fins deep 

 rich red, anal and ventral fins pale red, pectoral fins pale green; 

 numerous pearl organs were on the head, back, and sides. 



There is little room to doubt that Fowler's C. rubripinnis is this 

 species. Fowler compares it with G. repasson^ a species with four 

 barbels, but makes no comparison with C. apogon^ with which it is in 

 perfect agreement. Even the "fins all with red tinge," on which the 

 species appears to have been largely based, is a normal feature of 

 C. apogon. 



Vernacular names borne by the fish are plu nam lang^ pla sai tan^ and 

 pla tapien sai in Central Trailand ; pla sai tan in Southeastern Thai- 

 land ; and pla chang hra, pla ya, pla tadeng, and pla nom in the Penin- 

 sular district. 



CYCLOCHEILICHTHYS HETERONEMA (Bleeker) 

 FiGUKB 18 



Barhus heteronema Bleeker, 1853 (85), p. 446 (Sambas, Borneo). 



This little species, formerly known only from Borneo and Malacca, 

 was added to the list of known Thailand fishes in 1927 when, on Sep- 

 tember 26, the writer collected specimens in the Tale Noi. In July 

 1929 the fish was found to be very abundant there, some of the seine 

 fishermen having large catches in their boats, and many specimens were 

 collected. Although the Tale Noi is connected with the inner lake of 

 the Tale Sap by several narrow canals, this species has not yet been 

 recorded for the Tale Sap, where considerable collecting has been done. 



