826 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



Body oblong, moderately compressed; mouth rather large, with one 

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

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

 rather long and slender; scales ctenoid; lateral line 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. 

 -j Hippoglossus ; etdoq, resemblance.) 



a. Lateral line simple; dorsal beginning above eye. 



I). Upper jaw with oue series of teeth. (Hippoglossoides.') 



II. platessoides (Fabricius) Gill. Bough Dab. 

 Reddish 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, the upper longer than snout, 4 

 in head; lower jaw included, 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 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 pre-anal spine; pectoral not quite 

 half length of head. Head 33; depth 2. D. 88 (80 to 93); A. 70 (04 

 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. 



(Pleiironectes platexsoides Fabricius Fauna Groenlandica, 1780, 164: Plcuroncctes 

 limando'ulrx lilorh. Ausl. Fischc, iii, 24, tab. 106: Pomatopsctta dentaia Gill, Proc. 

 Acad. Nat. Sci. 1'liila. 1864, 5/17: Hippoglosaoides UmandoiiUx (iiinthcr, iv, 4()[>: Ilippo- 

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



1273. II. clussodoii 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 pupil, 2 in head; teeth small, close-set, 

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

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

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

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



