3o6 



FLATFISHES (HF.TEROSOMATA) 



Genus 7. LYOPSETTA. 



Lyopsclla. Jordan .iiid Goss, 1887. Rep. U.S. Cc 

 Jordan and Gilbert] ; Jordan and Evernia 



Fish., .\iii, (1885), p. 023 [Hippoglo^soides exilis, 

 , 1898, Bull. U.S. Nat. Mus., xlvii (3), p. 2612. 



Close to fiippoglossoides, but with two series of teeth in the upper jaw, those of 

 the outer row larger than those of the inner and a little enlarged anteriorly ; no 

 distinct canines ; pectoral fin of ocular side much larger than that of blind side, all 

 the rays simple ; scales of moderate size, thin, deciduous, ctenoid on both sides of 

 biidv : vertebra^ 45 (n + 34) 



.\ single species from the North I'acilic. 



LYOPSETTA EXILIS (Jordan and Gilbert). 



[Slender Flounder.; 



r88i, Proc. U.S. Nat. 

 at. Mus.. iv, (1881), p. 



Mu 



67; Jo 



1, (I 



Hippoglnssoidcs fxdis. Jordan and Gilbert, 



Jordan and Gilbert, 1882, Proc. U.S. > 



Hull. U.S. Nat. Mus., xvi, p. 827. 

 Hippoglossoidcs {Lyopsclla) exilis. Jordan and Goss, 1887, Rep. U.S. Com. Fish., xiii, (1885), p. 923. 

 Lyopsclla exilis, Jordan and Goss. 1889, Rep. U.S. Com. Fish., xiv, (1886), p. 238 ; Jordan and 



Evermann, 1898, Bull. U.S. Nat. Mus., xlvii (3), p. 2612 ; Evermann and Goldsborough, 1907, 



Bull. U.S. Bur. Fish., xxvi, (1906), p. 352 ; Starks and Morris, 1907, Univ. Calif. Pub. Zool., 



Mu 



1(11). p. 

 xlvii 



: Starks, 1911 

 376 ; Starks, 



Ann. Carnegie Mu 

 . Calif. Fish G, 



p. 203 ; Gilbert, 

 (4). p. 6, ftg, 84. 



1915, Proc. U.S. Nat. 



227.— Lyopsclla cxiln 



l)e])th of body 3 to 3J m the length, length of head 3! to 4. Snout as long as or 

 shorter than eye, diameter of which is 3^ to 4^ in length of head ; anterior margins 

 of eyes level or lower a very little in advance of upper, which touches edge of head. 

 Maxillary scarcely extending to below middle of eye, length about 2^ in that of head ; 

 lower jaw scarcely projecting, 2j to 2J in head. 9 to 11 gill-rakers on lower part of 

 anterior arch. O5 to 72 scales in lateral hue, 16 to 19 between lateral line and middle 

 of back. i:)orsal (77) 78-83 (85). Anal 59-65. Pectoral of ocular side with 10 rays, 

 length i.i to 2 in that of head. Caudal with iS or 10 rays (12 or 13 branched), rounded 



