2614 Bulletin //, United States National Museum, 



Hippoglossoides jordani, Lockington, Proc. IT. S. Nat. Mn.s. 1879, 73, San Francisco (Coll. 

 "W. N. Lockington); Lockington, Eep. Com. Fisberies California 1878-79,40; Lock- 

 ington, Scientific Tress Supplement, April, 1879, 120 ; Jordan & Gilbert, Proc. U.S. 

 Nat. Mus. 1880, 451 ; Jordan & Gilbert, Proc. V. S. Nat. Mus. 1881 , 67 ; Jordan & Gil- 

 bert, Synopsis, 826, 1883 ; Jordan, Nat. Hist. Aquat. Anim., 187, 1884. 



JSopsettajordani, Jordan & Goss, Keview Flounders and Soles, 239, 1889. 



ioi8. HIPPOGLOSSOIDES, Gottsche. 



Hippoglossoides, Gottsche, Archiv fur Naturgesch. 1835, 164 (" limanda" =^plate8soides). 

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



Bleeker, 1862. 

 Drepanopsctta, 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 H. elassodon). 

 Body oblong, moderately comjiressed ; month 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 tin low in front, Ijegiiiuing 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. {iZ7tdyAco6doz, 

 JSippoglossus; eido^, resemblance.) 



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



o))tu8e, prominent, rather broad ridge. platessoides, 2980. 



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



witli a narrow, nearly naked ridge. elassodon, 2981. 



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



with 2 rows of scales. 



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



lb. Depth 2§ in length; D. 72; A. 56; pectoral j in length of head. 



HAMILTONI, 2983. 



2980. HIPPOGLOSSOIDES PLATESSOIDES (Fabricius). 

 (Sand-Dab.) 



Head 3i; depth 2i. 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, 2f 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, i^ in head; lower jaw included, but with a 

 projecting knob at the chin; anout 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; tins with small, rough scales; a strong preanal spine; pec- 

 toral not quite 1 length of head. Reddish brown, nearly plain. The 

 identity of the American and European rejiresentatives of this species 

 {platessoides and Umandoides) is now conceded by all writers. A little 

 ditfercnce is recognizable between arctic and subarctic examples, the 



