PLEURONECTIN^ 301 



3. HIPPOGLOSSOIDES DUBIUS, Schmidt. 



Mippoglossoidcs dubius, Schmidt, 1904, Pise. .Mar. Orient., p. 227, pi. vi, tig. i ; Snyder, igl2, Proc. 



U.S. Nat. Mus., xlii, p. 439 ; Hubbs, 1915, Proc. U.S. Nat. Mus., .\lviii, p. 466 ; Jordan and 



Hubbs, 1925, Mem. Carnegie Mus., x, p. 298. 

 Cynopsetta dubia, (Schmidt in lilt.) Jordan and Starks, 1906, Proc. U.S. Nat. Mus., .\xxi, p. 188; 



Tanaka, 1913, Fish. Japan, xii, p. 207, pi. Ixxviii, fig. 212 ; Jordan, Tanaka and Snyder, 1913, 



J. Coll. Sci. Tokyo, xxxiii (l), p. 320. 

 Hippoglossoides hatakum, Snyder, 1911, Proc. U.S. Nat. Mus., xl, p. 546 ; Snyder, 1912, Proc. 



U.S. Nat. Mus., xlii, p. 439, pi. Iviii, fig. i ; Jordan, Tanaka and Snyder, 19x3, J. Coll. Sci. 



Tokyo, xxxiii (r), p. 320. 

 Hippoglossoides classodon dubius, Schmidt, 1915, Ann. Mag. Nat. Hist., (8) 



and Lindberg, 1930, Bull. Pac. Sci. Fish. Inst., v, p. 394 ; Schmidt, 



Russ., p. 316. 

 Hippoglossoides {Cynopsetta) dubius, Hubbs, 1918, .\nnot. Zool. Japon., ix, p 



Fig. 222. — Hippoglossoides dubius. B.M. (N.H.) 1923. 11 .21 .4. X \. 



Depth of body 2| to 2| in the length, length of head 3J to 3|. Snout (in adults) 

 longer than eye, diameter of which is 4* to 6j in length of head ; anterior margins of 

 eyes about level. Maxillary extending to below posterior part of eye, length 2J to 

 2 J in that of head ; lower jaw a little projecting, 1% to nearly 2 in head ; outline of 

 upper jaw more strongly curved and irregular than in H. classodon ; anterior teeth in 

 upper jaw enlarged and forming distinct canines. 7 branchiostegal rays ; (i i) 13 to ig 

 (16) gill-rakers on lower part of anterior arch. Scales moderately ctenoid on 

 ocular side, cycloid or rather feebly ctenoid on blind side ; 88 to 93 in lateral line, 

 about 38 between lateral line and middle of back. Lateral line with a low curve 

 above the pectoral fin. Dorsal (79) 82-87 (9°) '• origin just in front of eye or above 

 its anterior margin. Anal (62) 64-65 (69). Contours of posterior parts of dorsal 

 and anal fins more or less concave. Pectoral of ocular side with 10 or 11 rays, length 

 I j to 2f in that of head. Caudal with 18 rays (10 to 12 branched), rounded or nearly 

 truncate ; caudal peduncle deeper than long. Uniformly brownish ; dorsal and anal 

 fins sometimes with pale margins. 



Type. — Zoological Museum, Leningrad. No. 12366. 



Distribution. — Southern Okhotsk Sea ; Gulf of Tartary ; Sea of Japan, south- 

 wards to Corea. 



Specimens Examined : 



1 (390 mm.). Gulf of Tartary (47' 32' N., 141' 4,'j' VV.). U.S. Nat. Mus. 



2 (165, 260 mm.). Tokyo Market. Tokyo Imp. Univ. 

 I (415 mm.). ,, ,, 



I (300 ,, ). Sea of Japan, off Tajima Prov. ,, 



