2614 Bulletin 4.7, United States National Museum. 



Hippoglossoidesjordani, LOCKINGTON, Proc. IT. S. Nat. Mus. 1879, 73, San Francisco (Coll. 

 ~W. N. Lockington); LOCKINGTON, Kep. Com. Fisheries California 1878-79,40; LOCK- 

 INGTON, Scientific Press Supplement, April, 1879, 120; JORDAN & GILBERT, Proc. TJ. S. 

 Nat. Mus. 1880, 454 ; JORDAN & GILBERT, Proc. U. S. Nat. Mus. 1881, 67 ; JORDAN & GIL- 

 BERT, Synopsis, 826. 1883 ; JORDAN, Nat. Hist. Aquat. Aniin., 187, 1884. 



Eopsettajordani, JORDAN & Goss, Review Flounders and Soles, 239, 1889. 



1018. HIPPOGLOSSOIDES, Gottscho. 



Hippoglossoides, GOTTSCHE, Archiv fur Naturgesch. 1835, 164 ("Iimanda"=platea8oides). 

 Citharus, REINHARDT, Kong. Dansk. Vid. Selsk. 1838, 116 (platessoides) ; not Citharus 



BLEEKER, 1862. 



Drepanopsetta, GILL, Cat. Fish. East Coast N. A., 50, 1861 (platessoides). 

 Pomatopsetta, GILL, Proc. Ac. Nat. Sci. Phila. 1864, 217 (" dentata"=platessoides). 



Eyes and color on the right side (except sometimes in JI. elassodori). 

 Body oblong, moderately compressed ; mouth rather large, with 1 row of 

 sharp teeth on each jaw ; no teeth on vomer or palatines ; gill rakers rather 

 long and slender; scales ctenoid; lateral line nearly straight, simple; 

 dorsal fin low in front, beginning over or before the eye ; veutrals both 

 lateral; caudal double truncate, produced behind. This genus, as here 

 restricted, contains 3 closely related species, 2 of the North Pacific, 1 of 

 the North Atlantic. All are essentially arctic species, inhabiting shal- 

 low waters in the regions where they are most abundant. (i7tit6yXGO(56o$, 

 Hippoglossus; eido$, resemblance.) 



a. Dorsal rays about 88; anal about 70; gill rakers x + 10 ; interorbital space with an 



obtuse, prominent, rather broad ridge. PLATESSOIDES, 2980. 



act. Dorsal rays about 82 ; anal about 61 ; gill rakers x + 12 to 14 ; interorbital space 



with a narrow, nearly naked ridge. ELASSODON, 2981. 



aaa. Dorsal rays 72 to 76 ; anal 56 to 60 ; gill rakers x -\- 12 ; interorbital space moderate, 



with 2 rows of scales. 



b. Depth 2 in length ; D. 76 ; A. 60 ; pectoral length of head. ROBUSTUS, 2982. 

 l>b. Depth 2 in length ; D. 72 ; A. 56 ; pectoral f in length of head. 



HAMILTONI, 2983. 



2980. HIPPOGLOSSOIDES PLATESSOIDES (Fabricius). 



(SAND-DAB.) 



Head 3f ; depth 2. D. 88 (80 to 93) ; A. 70 (64 to 75) ; scales 90 (pores). 

 Body ovate ; mouth moderate, oblique ; maxillary narrow, reaching to be- 

 low pupil, 2 in length of head; teeth rather small, conical, larger anteri- 

 orly, in 1 row in each jaw, those in the lower largest. Eyes rather large, 

 the upper longer than snout, 4 in head; lower jaw included, but with a 

 projecting knob at the chin; snout thick, scaly; interorbital space nar- 

 row, with a raised obtuse ridge entirely covered with rough scales in 

 about 6 series ; mandible with a series of scales ; gill rakers rather short 

 and robust, not toothed, about 10 below angle, the longest less than 

 length of eye ; fins with small, rough scales ; a strong preanal spine ; pec- 

 toral not quite ^ length of head. Reddish brown, nearly plain. The 

 identity of the American and European representatives of this species 

 (platessoides and limandoides) is now conceded by all writers. A little 

 difference is recognizable between arctic and subarctic examples, the 



