220 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



Squamation : Lateral line slightly decurved, running to lower half 

 of caudal peduncle ; scales in lateral line 35, in transverse series to base 

 of ventrals 6-1-5, in predorsal region 15, surrounding narrowest part 

 of caudal peduncle 14. 



Fins: Origin of dorsal fin slightly posterior to ventrals, over the 

 twelfth scale of the lateral line, about midway between tip of snout and 

 base of caudal fin ; dorsal rays ii, 11, second unbranched ray stiff and 

 stout, first branched raj^ shorter than head ; caudal well forked, longer 

 than head ; anal rays ii, 11, second simple ray stiff, first branched ray 

 1.5 in head; ventrals 1.5 in head; pectorals slightly longer than 

 ventrals. 



...^ 



Figure 39. — Acaiithorhodeus dcignani, new species: Paratype (U.S.N.M. No. 107892). 

 Drawn bv Mrs. Aniie M. Awl. 



Coloration (in preservative) : A light band about two scales in 

 width extending from head to caudal base ; in this band posteriorly a 

 narrovv' blackish stripe beginning over anal and continuing nearly to 

 base of caudal fin ; fins plain, but with faint indications of dark spots on 

 the dorsal and anal rays. 



Type and paratypes. — A specimen 6.4 cm. long (U.S.N.M. No. 

 107938), the type, was collected by H. G. Deignan April 26, 1936, in 

 Huey Nam Puat, a tributary of the Mekon, at Ban Nam Puat, French 

 Laos. Paratypes are U.S.N.M. Nos. 107892, 107893. 



Other spechnens. — Taken at the same place and time were three 

 other specimens 4.3, 5.5, and 6.2 cm. long, in which the dorsal rays 

 were ii, 12 and the anal rays ii, 11. 



Remarks. — This species has been compared with specimens of A. 

 asinussi (Dybowski) from Siberia and China in the U. S. National 

 Museum and with specimens of A. guichenoti Bleeker and A. tonh'm- 

 ensis Vaillant from China lent by the American Museum of Natural 



