113. PLEURONECTID^ ACHIRUS. 841 



129§. I?I. sessilicauda Goode. 



Ashy brown, with (hirker brown spots; blind side white; pectoral 

 blackish, with traces of darker transverse bauds. Body thin, its thick- 

 ness not greater than the diameter of the eye ; depth 7| times the diame- 

 ter of the eye; head everywhere closely thatched with scales even to 

 the edges of the lips. Vertical fins mostly scaly. Lateral line on left 

 side arched, its direction lieciiliar, the curve ha vinj^' two angles; lateral 

 line on blind side nearly straight. Dorsal beginning on the snout, 

 highest posteriorly, its longest rays half the head; anal beginning close 

 to the vent. Caudal rounded. Pectoral three-fourths length of head. 

 Ventrals on the median line, equal. Head 5; depth 2|. D. 99 to 103; 

 A. 79 to 84; scales 23-92-25, 20 in the anterior curve. L. 6 inches. 

 Gulf Stream, off ISTewport, Ehode Island. [Goode.) 



(Goode, Proc. U. S. Nat. Mus. 1880, .338.) 



464.— ACIBBRUS Lac^pede. 



Boles. 



(Lac^p^de, Hist. Nat. des Poiss. iv, 659, 1802: type Pleiironectes achirus L,. =^ Achirus 

 fasciatus Li&c.^Pleuronectes lineatus L.) 



Eyes and color on the right side. Body oblOng, bluntly rounded 

 anteriorly. Head small ; eyes small, close together, the upper eye in 

 advance of the lower; mouth small, somewhat turned toward the colored 

 side; nasal flaps present, the nostril of the blind side fringed; lip of the 

 colored side fringed; teeth very small, on blind side only; gill-openings 

 narrow; the branchiostegal region scaled. Head closely scaled every- 

 where, the scales on the colored side similar to those on the body, those 

 of the nape and chin much enlarged; scales on the blind side anteriorly, 

 have their pectinations more or less produced, forming cirri ; scales of 

 both sides extremely rough, extending on the fins. Lateral line straight, 

 simi>le; edge of jireopercle covered by the scales. Dorsal beginning 

 on the snout, low in front and thickly scaled, its rays divided; anal fin 

 similar, without spine; caudal fin free, convex; caudal peduncle very 

 short and deep; i)ectoral fin of left side wanting, that of right si«le 

 small or obsolete; ventral rays 3 or 4, the ventral fin of the colored side 

 long, connected with the anal by a membrane, {o^/j^p, without hands; 

 *. e., without pectoral fins.) 



a. Pectoral fins both obsolete. (Achirua.) 



129». A. linoatiis (L.) Ciiv. 



Olive brown, usually with about G narrow vertical black cross-lines 

 usually not broader than pupil and with numerous black sjiots and 



