264 BULLETIN 18S, UNITED STATES NATIONAL MUSEUM 



circumscribed range in Thailand. It is in fact known from only two 

 specimens, 11.7 and 14.5 cm. long, collected by R. Havmoller in Klong 

 Sok, one of the headwaters of the Tapi River, southwest of Bandon, 

 Peninsular Thailand, in December 1929. In these examples the brown 

 longitudinal band, dark back, and black areas on the dorsal, anal, and 

 ventral fins were sharply defined ; the larger fish had the snout thickly 

 beset with minute prickly tubercles, while in the smaller fish the 

 tubercles were lower and not prickly. The sharp line of demarcation 

 between the snout and the upper lip shown in Weber and de Beaufort's 

 figure of this species is absent in these specimens. 



EPALZEORHYNCHOS KALLIURUS, new species 



Figure 51 



Description. — Moderately compressed ; depth of body 4.4 in stand- 

 ard length, 5.7 in length with caudal fin; least depth of caudal pe- 

 duncle 1.5 in its length and 2 in length of head; snout about 3 in 

 head, slightly longer than eye; eye 1.3 in interorbital space; a mod- 

 erately wide free orbital margin; barbels short, rather stout, rostral 

 barbel reaching beyond edge of upper lip and rather more than 0.5 

 eye, maxilliary barbel less than 0.5 rostral ; upper lip with 14 plicae, 

 each terminating in a free point. 



Figure 51. — Epaheorhynchos kalliurus, new species: Type (U.S.N.M. No. 109764). 

 Drawn by Mrs. Alice C. Mullen. 



Squamation : Tube-bearing scales in lateral line 28, tubes deficient 

 on the black peduncular spot; scales in transverse series from mid- 

 line of back to midline of abdomen 4.5-1-4.5, with 3 scales between 

 lateral line and origin of ventral fin; predorsal scales 10; circum- 

 peduncular scales 16. 



Fins: Dorsal origin much nearer to tip of snout than to base of 

 caudal, over tenth scale of lateral line ; margin of fin concave ; dorsal 

 rays iii,8, first branched ray slightly longer than head ; caudal longer 

 than head, forked for about 0.5 its length, the lobes pointed; anal 



