FISHES OF WEST COAST OF PEEU. 87 



Head 2.77 in length; depth 2.94; eye 3.53 in head; snout 2.79; 

 maxillary 3.53; interorbital 4.07; pectoral 1.18; fourth dorsal spine 

 longest, 1.66 ; second anal spine 1.66 ; D. XIII, 12 ; A. Ill, 7^ ; scales 

 7-44 (+4) -13. 



Body elongate, compressed, greatest depth under second dorsal 

 spine; anterior outline of head strongly convex; interorbital broad 

 and flat; snout blunt; mouth small, horizontal; maxillary scarcely 

 reaching vertical from anterior border of eye; preorbital 1.5 in eye; 

 vertical margin of preopercle strongly and coarsely serrate; teeth in 

 narrow villiform bands, broadest anteriorly; scapula serrate; gill- 

 rakers slender, 4-|-ll; dorsal and anal each fitting into a narrow 

 scaly sheath. Fourth dorsal spine longest, equal to second anal spine, 

 which is considerably longer than the third ; ventrals reaching within 

 one-half diameter of pupil of vent; pectoral longer, reaching to ver- 

 tical from center of vent. 



Color in alcohol, silvery brown. 



This well-marked species is easily recognized by the tumid ap- 

 pearance of the snout; the broad, flat, interorbital; the arched pro- 

 file from the nape to second or third dorsal spine ; and the large e3^e. 

 It occurs on the Pacific coast of tropical America from Mazatlan to 

 Peru. 



Genus ORTHOPRISTIS Girard. 



THE PIGFISHES. 



KEY TO SPECIES. 



a\ Eye 1.75 to 1.9 in snout ; origin of dorsal over origin of pectoral ; A. Ill, 

 11 or 12 chalceus,p. 87. 



a^ Eye equal to snout ; origin of dorsal somewhat behind origin of pectoral ; 

 A. Ill, 13 . modestus, p. 88. 



116. ORTHOPRISTIS CHALCEUS (GUnther). 

 CORCOVADO. 



Pristipoma chalceum GtJNTHER, Proc. Zool. Soc. London, 1864, p. 146; 

 Panama. 



Orthopristis chalceus Evebmann and Jenkins, Proc. U. S. Nat. Mus., vol. 

 14, 1891, p. 149; Guaymas. — Jordan and Eveemann, Fishes Nortli 

 and Mid. Amer., vol. 2, 1898, p. 1337. — Gilbert and St arks, Fishes of 

 Panama Bay, Mem. California Acad Sci., vol. 4, 1904, p. 110. 



One specimen, field No. 09724, 35.8 cm. long, from Lobos de 

 Afuera. 



Head 2 in length ; depth 2.76 ; eye 5 in head ; snout 2.74 ; maxillary 

 3.4; preorbital 4.8; interorbital 3.65; pectoral 1.25; D. XI, 16 (|) ; 

 A. Ill, 11 (1) ; scales 12-54 ( + )-19; gillrakers, 7+12. 



