1908. J FRESH-WATER FISHES FROM COREA. 61 



SlLURID^. 

 7. SiLURUS BEDFORDI, Sp. 11. (Plate II. fig. 3.) 



Depth of body 6 in the length, length of head 4j to 5|. 

 Breadth of head about 1^ m its length, diameter of eye 7| to 9, 

 interocular width If to 2, length of snout 3| to 3|. Lower jaw 

 projecting ; vomerine patches of teeth either narrowly separated 

 or united anteriorly. Four bai"bels, the mandibulary ones less 

 than f as long as the maxillary ones, which extend nearly to the 

 posterior end of the pectoral fin (adult) or beyond (young). 

 Gill-rakers short, 6 to 9 on the lower part of the anterior arch. 

 Dorsal 5, its distance from the end of snout | its distance from 

 the caudal (young) or less (adult). Anal 73-78, continued on to 

 the caudal. Pectoral spine stout, its length a little more than 

 A that of the fin or nearly ^ the length of head ; outer edge 

 roughened or finely serrated, inner edge entire. Yentrals with 

 13 rays. Caudal subtruncate. Adult uniformly greyish (ix:k 

 spirit) ; young dark greenish above, yellowish below, with the 

 sides and anal fin marbled. 



Two specimens, 130 and 275 mm. in total length, one from 

 Kimhoa, the other from Chong-ju. 



This species is closely allied to Silurus asotus L., from China 

 and Japan, which difiers especially in the longer pectoral spine 

 with both edges serrated. From *S'. grahami Regan, from 

 Yunnan, with which it agrees in the structure of the pectoral 

 spine, S. hedfordi is distinguished by the broader head, shorter 

 snout, and shorter pectoral spine (f the length of head in 

 S. grahami). 



8. LioBAGRUS ANDERSONi, sp. n. (Plate III. fig. 4.) 



Depth of body 6 in the length, length of head 4|-. Head 

 nearly as broad as long ; interocular width 3 in the length of 

 head. Jaws equal anteriorly ; prsemaxillary band of teeth 2 to 2^ 

 as long as broad ; posterior mandibulary barbel extending to 

 basal part of pectoral. Dorsal I 5 ; spine f the length of head. 

 Pectoral spine f the length of the fin, which is f the length of 

 head. Anal 15. Caudal rounded or subti'uncate. Greyish; fins 

 more or less dusky, with pale edges. 



Three specimens from Kimhoa, 65 miles north-east of Seoul, 

 the largest 110 mm. in total length. 



The genus Liohagrus, established by Hilgendorf in 1878, is now 

 known to include six species, which may be distinguished by the 

 following synopsis : — 



I. Jaws equal anteriorly or the lower slightly projecting ; depth of body about 

 6 in the length ; interocular width 2j to 3 in the length of head. 

 Length of head SJ to 3f in the length of the fish ; prsemaxillary 

 band of teeth 4 times as long as broad ; posterior mandibulary 

 barbel extending to base of pectoral or slightly beyond ; dorsal 

 spine I the length of head nigricauda. 



