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, iu the upiier jaw, is ofteu 
an inner row of small teeth; no teeth on vomer or palatines; gill-rakers 
rather long and slender; scales ctenoid; lateral line nearly straight, 
simi)!^, or with an accessory dorsal branch. Dorsal tin low in front, 
beginning over or before the ej^e; ventrals both lateral; caudal double 
truncate, x)roduced behind. Siiecies found in the Northern seas. 
Ilij)j)oglossus ; £idoq^ resemblance.) 
a. Lateral line simple; dorsal beginning above eye. 
J). Upper jaw with one series of teeth. {Ilippoglossoides.') 
1272. II. platessoades (Fabricuis) Gill. — Rough Dab. 
Eeddish brown, nearly itlain. Body ovate; mouth moderate, oblique; 
maxillary narrow, reaching to below pui)il, 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 ujtxier longer than snout, 4^ 
in head; lower jaw included, but with a iirojecting knob at the chin. 
Snout thick, scaly; interorbital space narrow, with a raised, obtuse 
ridge, entirely covered with rough scales in about G 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 iire-anal sjiine; i)ectoral not quite 
half length of head. Head 3f; depth 2J. D. 88 (80 to 93); A. 70 (04 
to 75); Lat. 1. 90 (x)ores). North Atlantic; abundant northward on both 
coasts. Southern siiecimens (var. Umandoides) have, as a rule, a, smaller 
number of fin-rays than northern specimens. 
{Plmronectes platessoides Fabricius Fauna Grcenlandica, 1780, 104: Pleuronectes 
Umandoides Bloch. Ausl. Fisclie, iii, 24, tab. 106: Pomatopsetta dentata Gill, Proc. 
Acad. Nat. Sci. Pbila. 1864, 217: Hippoglossoidts Umandoides GiiutUev, iv, 40.5: Rippo- 
glossoides dentatus Giintbei’, iv, 406; Collett, Norske Nord-bavs. Exp. Fiske, 1880, 144.) 
1273. II. eSnssodoii Jor. & Gilb. 
Brownish, nearly uniform, sometimes sitotted with darker; fins gray- 
ish, irregularly blotched with duskyb Body oblong-ellixitical; caudal 
peduncle about as long as deep; mouth rather large, the gape curved; 
lower jaw projecting, with a symidiyseal 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 
IG 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 
