ON TWO SPECIES OF FISHES FROM THE YALU RIVER, 



CHINA. 



By Isaac Ginsburg, 



Aid, Division of Fishes, United States National Museum. 



The United States National Museum has received, through the 

 kindness of IVIr. Arthur de C. Sowerby, a very desirable and repre- 

 sentative series of fresh-water fishes from Manchuria collected by 

 himself. The following descriptions of two species from the Yalu 

 River are deemed of sufficient interest to ichthyologists to warrant 

 their publication. 



HEMIBARBUS LONGIROSTRIS (Regan). 



Acanthogobio longirostris Regan, Proc. Zool. Soc. London, 1908, p. 60, pi. 3, 



fig. 3. 

 Hemiharhus labeo Berg, Faun. Russ. Poiss., vol. 3, 1914, p. 631 (in synonymy). 



Two specimens 105 and 155 mm. long are evidently this species. 

 Berg places it in the synonymy of Hemiharhus laheo Bleeker with a 

 query. However, it seems to be a valid species. Compared with 

 specimens of the same size of H. laheo and H. maculatus, the following 

 differences are found. The scales are larger, the formula being 



41-44> -^, while in the older species it is 47-52j ~-^ • The sub- 

 orbital ring and preopercle are much wider, and contain large mucifer- 

 ous cavities. The exposed muscular part of the cheek at the angle 

 of the preopercle is one-half or less the vertical diameter of the pupil, 

 while in the other species it is equal to the vertical diameter of the 

 pupil or more than that. In coloration the present species is nearest 

 to H. maculatus. The dorsal and caudal fins are spotted with black, 

 but there is no regular row of large black spots on the sides. The 

 sides are dotted irregularly with small black spots which, in the 

 smaller specimen, are connected with more or less indistinct lines 

 forming reticulations. 



Regan records the pharyngeal teeth as being in two rows, and on 

 that account placed the species in Acanthogohio. However, the 

 pharyngeal bone from one side of the large specimen was dissected 

 out and the teeth were found to be 5. 3. 1. The small tooth of the 



Prgceedings U. S. National Museum, Vol. 54— No. 2228. 



99 



