302 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



pupil; gill-rakers very small, 4 below ou anterior arch. Loiiiiest ven- 

 tral filament half length of head; the shorter three-quarters length of 

 longer. Distance from origin of dorsal to tip of snout 3^ in total length ; 

 distance from origin of anal to snout 2| in total length. Scales minute, 

 imbedded. Pseudobranchia? not evident. Air-bladder short, thick, with 

 a large posterior foramen. 



Head -if^ in length ; depth about G. 



Color light olive-green, silvery on belly, cheeks, and lower side of 

 head; sides above with a few irregular, large, scattered, dark blotches; 

 about 9 of these along base of dorsal fin ; an intensely black, round 

 blotch on scapular region, rather larger than pupil; dorsal with black 

 blotches; anal largely black; upper half of eye black, lower half bright 

 silvery. 



A single specimen, 3i inches h)ng (Xo. 29070 LT. S. Nat. Mus.), taken 

 from the stomach of a Red Snapper, at Pensacola. 



As here understood the genus Genijpterus diflers from Opliidliim in 

 the presence of a spine on the opercle, a character api)arently of more 

 importance than that drawn from the dentition of the palatines. In 

 the latter respect 6^. omosHgma agrees more nearly with Ophidium. 



PLEURONECTID.E. 



117. Paralichthysdeiitatus(L.) J. & G.— jF/0H/(r7er. P.: G. (310:^8.) 



A common market-fish at Galveston, New Orleans, and Pensacola. 

 Our specimens agree with others from VTashington market and other 

 northern localities. 



The width of the iuterorbital space increases with age. In si)ecimeus 

 10 inches long, it is wider than the eye, aud equal to the length of the 

 snout, without the premaxillary. In young specimens it is proportion- 

 ately much narrower. 



D. 88; A. 71. Gill-rakers narrowly triangular, 3 to 4 times as high as 

 broad ; the mouth large, the maxillary reaching past eye, a little more 

 than half head. 



The genus Pscudorhomhus Bleekeris in all respects identical with the 

 prior ParaUchfhi/s Grd. Ancijlopsetta,, Ut'opsetfa, and Chcoiopfietta Gill, 

 as well as Rippoglossbia Steindachner and Xystrenrys J. »& G. are 

 inseparable from ParaUchtliys. 



118. Paralichthys albigtttta S11. uov. P. (nosiH.) 



Psendorhomhus doitatiis {"albigufta") Goode & Bean, Proc. U. S. Nat. Mus. 1B79, 

 125. (Specimeu No. 4887, U. S. Nat. Mus.) 



Body elongate, irregularly elliptical, the snout protruding, owing 

 to angulation of profile above front of upper orbit ; caudal peduncle 

 short nnd high, its length two-fifths the height, which equals two-fifths 

 length of head; head large, 3^ in length; mouth large; maxillary reach- 

 ing beyond lower eye, half length of head; teeth long, slender, conical; 

 those in lower jaw distant, 7 in number on each side, regularly and 

 rapidly decreasing in size towards angle of mouth; in front of upper 



