Vol. 32, pp. 163-164 September 30, 1919 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



AN AMERICAN FLOUNDER, LIMANDA BEANII, RE- 

 FERRED TO THE GENUS POECILOPSETTA. 



BY CARL L. HUBBS. 



In 1881 Goode described, under the name of I Amanda Beanii, 

 a small flounder which the United States Fish Commission 

 Steamer Fish Hawk had dredged in deep water off the southern 

 coast of New England. Subsequently the species has been re- 

 corded from the Gulf of Mexico. 



Although Goode noted some of the differences which widely 

 separate this form from the typical species of Limanda, no author 

 has assigned it to its true position in the system. It is clearly 

 referable, however, to the deep-water genus Poecilopsetta Giin- 

 ther, hitherto recorded only from the Indo-Pacific region; it 

 agrees in all respects with the following characterization of 

 that genus. 



Genus Poecilopsetta Giinther. 



Eyes dextral, the margin of the upper entering the dorsal profile; inter- 

 orbital space very narrow; head short; body strongly compressed, varying 

 from elongate to rather robust; dorsal fin composed of about 60 rays, ex- 

 tending from a short distance behind vertical through pupil nearly to caudal 

 base, of rather even height throughout; anal fin similar, of about 50 rays; 

 anal spine weak; caudal rounded; pectoral short, that of the eyed side with 

 7 to 10 rays; pelvics short, subequal, but somewhat asymmetric, approach- 

 ing those of the Psettinae, the one on the eyed side being slightly anterior to 

 the left one, and nearer the ventral ridge ; each pelvic fin of 6 rays ; scales mode- 

 rate in size or small, weakly ctenoid on eyed side, cycloid on blind side; in- 

 terorbital, snout and jaws naked; lateral line with a large, flat-topped arch 

 on eyed side, obsolete on blind side; mouth narrow, nearly symmetric, and 

 rather small; teeth villiform, in bands, present on jaws only, better devel- 

 32— Proc. Biol. Soc. Wash., Vol. 32, 1919. (163) 



