206 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 

 TRACHURUS MURPHYI Nichols 



Jurel; Jurflcito 

 Figure 45 



Trachurus symmetricus Evermann and Radcliffe (probably not of Ayres), 1917, 

 p. 59, pi. 5, fig. 2, Lobos de Afuera and Callao, Peru (description; discussion 

 of species of the genus; range). 



Trachurus murphyi Nichols, 1920, p. 479, Central Chincha Island, Peru (diag- 

 nosis; range; key to the species). — Nichols and Murphy, 1922, p. 508, 

 North Chincha Island, and Central Chincha Island. 



Head 5.6 to 5.8; depth 6.5 to 7.0; D. VIII-I, 30 to 33-1; A. II-I, 

 25 to 27-1; P. 21 to 23. 



Body of large specimens rather robust, round, its greatest thickness 

 equal to about two-thirds of its depth (deeper and more compressed 

 in young); dorsal profile similar to ventral profile, gently convex; 

 caudal peduncle depressed, its depth 8.4 to 9.4 in head; head more 

 strongly compressed than anterior part of body; snout fairly pointed, 

 3.25 to 3.4 in head; eye 4.3 to 4.9; interorbital 4.0 to 4.6; mouth oblique, 

 with lower jaw projecting rather strongly; maxillary rather broad, 

 with a narrow supplemental bone, with straight or slightly concave 

 posterior margin, extending nearly to pupil, 2.6 to 2.8 in head; teeth 

 very small, pointed, mostly in a single series on jaws, present also on 



iMiS^jiiii&Si^A^ 



Figure 45. — Trachurus murphyi Nichols. From a specimen 440 mm. long, Callao, Peru 

 (U.S.N.M, No. 77684). (After T. symmetricus Evermann and Radcliffe, 1917.) 



vomer, palatines and in a long narrow band on middle of tongue; gill 

 rakers slender, becoming very short at each end of the arch, the longest 

 ones about two-thirds length of eye, 45 to 48 on lower and 15 to 17 on 

 upper limb of first arch; lateral line strongly decurved under anterior 

 part of second dorsal, the chord of the curved part and the straight 

 part of about equal length, entire lateral line armed with bony scutes, 

 only those in straight part with spines, the deepest scutes of each sec- 

 tion of the lateral line of about equal depth, those of curved part 5.0 

 to 5.9 in head, and those of straight part 5.3 to 6.2, total number of 

 scutes in lateral line 93 to 104; accessory branch of lateral line ending 

 under anterior part of second dorsal ; scales covering entire body, a nd 

 most of head exclusive of snout; first dorsal with flexible spines, con- 



