PLEURONECTIN^ 



347 



Specimens from deeper water off the New England coast may represent a distinct 

 race (dignabilis), with a different spawning season. The characters used by Kendall 

 in describing this form as a new species (j. e. size of head, number of dorsal and anal 

 rays, coloration) do not appear to be constant. 



Nichols (1918, Copeia, Iv, p. 37) describes a fish from New York Market, believed 

 to be a hybrid Pseudopleuronectes americaniis •; Limanda ferruginea. 



(igo2), p. 624 [Dexistes rikuzeni; 

 , Jordan and Starks]. 



(icnus 19. DEXISTES. 



Dexistes, Jordan and Starks, 1904, Bull. U.S. Com. Fish., 



Jordan and Starks]. 

 Araias, Jordan and Starks, 1904, torn, cit., p. 624 [Araias 



Close to Limanda and Pseudopleuronectes , Eyes separated by a high, narrow ridge, 

 which is naked or scaled, the upper entering dorsal profile of head : parts of snout and 

 upper surfaces of eye-balls scaled. A strong bony protuberance at symphysis of lower 

 jaw. Teeth small, obtusely conical, not very close-set, uniserial in both jaws. Dorsal 

 fin commencing well behind po.sterior nostril of blind side and above middle of eye. 

 Caudal fin with 12 branched rays. Scales thin, rather deciduous, ctenoid on ocular 

 side, the spinules slender and numerous, cycloid on blind side. Lateral line 

 conspicuous, rising a little but without distinct curve about pectoral fin ; supra- 

 temporal branch present. Intestine not very narrow, of moderate length, with about 

 2\ coils ; 3 or 4 + I rather short pyloric appendages. 



A single species from Japan. 



I. DEXISTES RIKUZENIUS, Jordan and Starks. 



Z)«is/cs riiazentus, Jordan and Starks, 1904, Bull. U.S. Com. Fish., xxii, (1902), p. 624, pi. vi.fig. i ; 

 Jordan and Starks, 1906, Proc. U.S. Nat. Mus., xxxi, p. 212, fig. 17; Jordan, Tanaka and 

 Snyder, 1913, J. Coll. Sci. Tokyo, xxxiii (i), p. 324, fig. 273; Jordan and Thompson, 1914, 

 Mem. Carnegie Mus., vi, p. 310, fig. 83 ; Hubbs, 1915, Proc. U.S. Nat. Mus., xlviii, p. 487 ; 

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



Araias ariommus, Jordan and Starks, 1904, Bull. U.S. Com. Fish., xxii, (1902), p. 624, pi. vi, fig. 2 ; 

 Jordan and Starks, 1906, Proc. U.S. Nat. Mus., xxxi, p. 214, fig. 18. 



