PLEURONECTIN^ 



Genus 5. ACANTHOPSETTA. 



Acanthopsella, Schmidt, 1904, Pise. Mar. Orient., p. 237 [Acanthopsetia nadeshnyi, Schmidt]; 

 Hubbs, 1915, Troc. U.S. Nat. Mus., xlviii, p. 464. 



Very close to Hippoglossoides, but with snout and upper parts of eyeballs densely 

 scaled (at least in adults) ; teeth less strong, scarcely enlarged anteriorly ; dorsal 

 fin commencing above middle or posterior part of eye ; rays of dorsal and anal fins 

 more or less scaled on both sides ; middle rays of pectoral fin branched ; lateral line 

 with distinct supratemporal branch. 



A single species from the North Pacific. 



I. ACANTHOPSETTA NADESHNYI, Schmidt. 



Acanthopsetta nadeshnyi, Schmidt, 1904, Pise. Mar. Orient., p. 237, pi. v, fig. i ; Jordan and Starka, 

 1906, Proc. U.S. Nat. Mus., xxxi, p. 187; Jordan, Tanaka and Snyder, 1913, J. Coll. Sci. 

 Tokyo, xxxiii (i), p. 319 ; Hubbs, 1915, Proc. U.S. Nat. Mus., xlviii, p. 464 ; Soldatov and 

 Lindberg, 1930, Bull. Pac. Sci. Fish. Inst., v, p. 393 ; Schmidt, 1931, C.R. Acad. Sci. Russ., 

 p. 316. 



Fig. 224. — Acanthopsetta nadeshnyi. B.M. (N.H.) 1923 



Depth of body 2j to 2J in the length, length of head 3I to 3j. Snout shorter 

 than eye, diameter of which is 3J to 4 in length of head ; lower eye very slightly in 

 advance of upper, which touches edge of head. Maxillary not e.xtending to below 

 middle of eye, length about 3 in that of head ; lower jaw scarcely projecting, a little 

 more than 2 in head. 10 to 12 gill-rakers on lower part of anterior arch. Scales 

 ctenoid on both sides of body, 75 to 81 in lateral line. Dorsal (67) 70-74 (78). Anal 

 (54) 57-60 (62). Pectoral of ocular side with 9 to 11 rays (5 to 7 branched), length a 

 little more than ^ that of head. Caudal with 18 rays (12 branched), rounded ; caudal 

 peduncle nearly as long as deep. Uniformly brownish ; median fins rather paler. 



Type. — Zoological Museum, Leningrad. No. 12339-46. 



Distribution. — Okhotsk Sea ; Gulf of Tartary ; Sea of Japan, southwards to 

 Corea. 



Specimens Examined : 



