FISHES OF WEST COAST OF PERU. 51 



some of the others barely show through the mucous; in small speci- 

 mens the}^ are easily seen with the lens. 



Examples from the Arequipa market were bluish on back, silvery 

 white on belly. 



This widely distributed species is undoubtedly the most abundant 

 Mugil occurring on the coast of Peru, and is at once recognized by the 

 almost entire absence of scales on the soft dorsal and anal and the 

 longitudinal dark stripes along the rows of scales. 



Genus NEOMYXUS Steindacher. 



73. NEOMYXUS CILIILABIS (Cnvier and Valenciennes). 



Mugil ciliilabis Cxjvies and Valencienne>s, Hist. Nat. Poiss., vol. 11, 1836, 



p. 112 (151) ; Callao de Lima. 

 Myxus ciliilabis Gunthee, Cat. Fisli. Brit. Mus., vol. 3, 1861, p. 467. 

 Neomyxus ciliilabis, Kendall and Radcliffe, Mem. Mus. Comp. ZooL, voL 



35, No. 3, p. 88, April, 1912 ; Chatham Island. 



Family SPHYRAENIDAE. 



THE BARRACUDAS. 

 Genus SPHYRAENA (Artedi) Bloch and Schneider. 



74. SPHYRAENA IDIASTES Heller and Snodgrass. 

 AGUJA; PEJE-AGUJA. 



Sphyraena idiastes Hellek and Snodgkass, Proc. Washington Acad. Sci., 

 vol. 5, 1903, p. 190, pi. 2 ; Seymour Island, Galapagos Archipelago. — 

 Snodgkass and Hellek, Shore Fishes Galapagos Islands, Proc. Wash- 

 ington Acad. Sci., vol. 6, 1905, p. 354. 



One specimen, field No. 09730 (=09405), 53.7 cm. in length, from 

 Guanape North Island, and one specimen, No. 09694, 54 cm. in 

 length, from Lobos de Tierra. According to fishermen, these fishes 

 keep near the shore. 



Head 3.03 in length ; depth 7.85 ; eye 7.5 in head ; snout 2.42 ; maxil- 

 lary 2.83 ; interorbital 5.8 ; pectoral 3.33 ; D. V-I, 9 ; A. II, 8 ; scales 

 20-145-13 ; 137 j^ores in lateral line. 



Body slender, elongate, fusiform; head slender, conical; snout 

 pointed; lower jaw longer, projecting beyond upper a distance equal 

 to two-fifths diameter of eye; maxillary not reaching vertical from 

 anterior border of eye by a distance equal to diameter of pupil; 

 preorbital narrow, 2 in eye; teeth in jaws in a single series, smooth, 

 compressed, pointed, those on lower jaw longer and stronger; a 

 single stout tooth at tip in front of lower jaw; two elongate teeth 

 on inner premaxillaries. pointed backward, behind these in the same 

 straight line, on palatines there is a row of similar elongate teeth, 



