826 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



Body obloug-, moderately compressed; mouth rather large, with oue 

 row of sharp teeth on each jaw, besides which, in the upper jaw, ia often 

 an inner row of small teeth; no teeth on vomer or palatines; gill-rakers 

 rather long and slender; scales ctenoid; lateral liue nearly straight, 

 simple, or with an accessory dorsal branch. Dorsal fin low in front, 

 beginning over or before the eye ; ventrals both lateral ; caudal double 

 truncate, produced behind. Species found in the Northern seas. 

 ([--«^Aw<r?or, Hippoglossus ; si^o?, resemblance.) 



a. Lateral line simple; dorsal beginning above eye. 



J}. Upper jaw with one series of teeth. (Hippoglosamdes.) 



1273. H. platessoides (Fabricius) G\\\.— Rough Bah. 



Eeddish brown, nearly plain. Body ovate; mouth moderate, oblique; 

 maxillary narrow, reaching to below pupil, 2| in length of head; teeth 

 rather small, conical, larger anteriorly*, in one row in each jaw, those in 

 the lower largest. Eyes rather large, ttie upper longer than snout, 4^ 

 in head; lower jaw iocluded, but with a projecting knob at the chin. 

 Snout thick, scaly; interorbital space narrow, 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 ten below angle; longest raker less than one-third length of eye; 

 fins with small, rough scales; a strong i)re-anal spine; pectoral not quite 

 half length of head. Head 3f ; depth 2 J. D. 88 (80 to 93); A. 70 (64 

 to 75); Lat. 1. 90 (pores). North Atlantic; abundant northward on both 

 coasts. Southern specimens (var. limandoides) have, as a rule, a smaller 

 number of fin-rays than northern specimens. 



(Phuronectes platessoides Fabricius Fauna Groinlandica, 1780, 164 : Pleuroneetes 

 limandoides Bloch. Ausl. Fische, iii, 24, tab. 106: Pomatojisetta dentata Gill, Proc. 

 Acad. Nat. Sci. Phila. 1864, 217: Hippoylossoidts limandoides Giinther, iv, 405: Rippo- 

 glossoides dentatus Giinther, iv, 406; Collett, Norske Nord-havs. Exp. Fiske, 1880, 144.) 



1373. H. elassodon Jor. & Gilb. 



Brownish, nearly uniform, sometimes spotted with darker; fins gray- 

 ish, irregularly blotched with dusky. Body oblong-elliptical; caudal 

 peduncle about as long as deep; mouth rather large, the gape curved; 

 lower jaw projecting, with a symphyseal knob; maxillary narrow, 

 reaching beyond middle of i^upil, 2 J in head; teeth small, close-set, 

 nearly uniform, in a single row. Gill-rakers slender, smooth, about 

 10 below arch, the longest nearly half diameter of orbit. Eyes large, 

 separated by a narrow, knife-like ridge, which is naked or with a single 

 series of scales. Scales small, firm, rough, those on tail roughest, those 



