140 BULLETIN" 95, UNITED STATES NATIONAL MUSEUM. 



Family PLEURONECTIDAE, 



THE FLOUNDERS. 



Subfamily Hippoglossinae. 



THE HALIBUTS. 



Genus PARALICHTHYS Girard. 



KEY TO SPECIES. 



a\ GiUrakers 6 to 8+16 to 18; scales ctenoid adspersus, p. HO. 



a'. Gillrakers 4 or 5+11 to 13; scales cycloid ivoolmani, p. 140. 



167. PARALICHTHYS ADSPERSUS (Steindachner). 

 LENGUADO. 



Pseudorhombus adspersiis Steindachner, Ichth. Notizen, vol. 5, 1867, p. 9, 



pi. 2; Chinchas Islands. 

 Paralichthys adspersus Joedan and Evebmann, Fishes North and Mid. 



Amer., vol. 2, 1S98, p. 2627. — Abbott, Marine Fishes of Peru, Proc. 



Acad. Nat. Sci. Phila., 1899, p. 363. — Staeks, Fishes from Ecuador 



and Peru, Proc. U. S. Nat. Mus., vol. 30, 1906, p. 800. 



Two specimens, field No. 419, 24 and 27.3 cm. in length; two, 

 field Nos. 09575-6, respectively 25 and 25.3 cm. in length, from 

 Callao; and one, No. 501, 24.5 cm. in length, from Mollendo. 



Head 3.18 to 3.21 in length ; depth 2.18 ; snout to upper eye 3.65 in 

 head ; maxillary extending beyond vertical from posterior border of 

 eye; 2.2 to 2.3; upper eye 6.5 to 7; interorbital 1.4 to 1.6 in eye; D. 

 67 to 72; A. 55 to 59; gillrakers 6 to 8+16 to 18; P. 12; V. 6; scales 

 about 110; mouth large; teeth long and sharp, slightly incurved; 

 jaws subequal; dorsal and anal of equal height, longest rays 2.8 to 

 2.85 in head ; caudal double concave, middle rays longest, 1.45 to 1.5 ; 

 breadth of caudal peduncle 2.8 ; ventrals small, 3.25 to 3.6 ; pectorals 

 2.05 to 2.12 ; scales ctenoid, very rough ; snout and mandible without 

 scales ; a few scales on maxillary ; rays of fins broadly scaled, mem- 

 branes naked; lateral line strongly arched, the chord of the arch 

 2.25 to 2.5 in head, 3.5 to 4 in straight part of lateral line. 



Color in alcohol, coloration variable, brown or brownish gray ; fins 

 mottled; body thickly covered with dark spots, rings and dots or 

 quite plain. 



168. PARALICHTHYS WOOLMANI Jordan and Williams. 

 LENGUADO. 



Paralichthys icoolmani Jordan and Williams, Proc. U. S. Nat. Mus., 1896, 

 p. 457 ; Panama, erroneously credited to Galapagos Islands. — Jordan 

 and Evermann, Fishes North and Mid. Amer., vol. 3, 1898, p. 2628. — 

 Gilbert and Staeks, Fishes of Panama Bay, Mem. California Acad. 

 Sci., vol. 4, 1904, p. 197. 



Paralichthys sinalnae Jordan and Abbott in Jordan and Evermann, Fishes 

 of North and Mid. Amer., vol. 3, 1898, p. 2872 ; Mazatlan and La Paz. 



One specimen, field No. 09561, 42.4 cm. in length, from Paita. 



