FISHES OF WEST COAST OP PERU. 141 



Head, including opercular membrane, 3.16 in length to base of 

 caudal ; depth 2.15 ; snout to upper eye 4.54 in head ; maxillary broad, 

 extending slightly beyond vertical from posterior border of eye, 2.27 

 in head; upper eye 7.5 in head; interorbital rather broad, 1.4 in 

 eye; D. 70; A. 57; gillrakers 4-f 13; scales about 100. 



Caudal peduncle broad, 2.53 in head; dorsal high, longest dorsal 

 ray equaling longest anal ray, 2.86; middle rays of caudal longest, 

 1.37; ventrals small, inserted under posterior preopercular margin, 

 3.4; pectoral longer than ventrals, 1.98; scales cycloid, small ante- 

 riorly, becoming larger posteriorly; arch of lateral line very high, 

 chord of arch 1.9 in head, 3.5 in straight part of lateral line. 



Color in alcohol, dark chocolate brown ; fins mottled. 



This species closely resembles P. dispersus from which it may be 

 distinguished by the cycloid scales and the fewer gillrakers which 

 are stronger, farther apart and armed with coarser teeth on their 

 inner edge. 



Subfamily Psetitnae. 



THE TTJRBOTS. 



Genus CITHARICHTHYS Bleeker. 



169. CITHARICHTHYS GILBERTI Jenkins and Evermann. 



TAPADERO. 



Cithariclithys gilherti Jenkins and Evermann, Proc. U. S. Nat. Mus., 1888, 

 p. 157 ; Guaymas, Mexico. — Jokdan and Evehmann, Fishes North and 

 Mid. Amer., vol. 3, 1898, p. 2686. — Steindachneb, Herpet.-iehthyol., 

 Ergebnisse einer Reise nach Siidameriiia, Denkschr. Akad. Wiss. Wien, 

 vol. 72, 1902, p. 45; Guayaquil. — Gilbeet and Stakks, Fishes Panama 

 Bay, Mem. California Acad. Sci., vol. 4, 1904, p. 200. — Staeks, Fishes 

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

 Guayaquil. 



Two specimens, field No. 1004, 17 and 21.5 cm. long, from Tumbes, 

 taken with a casting net at the mouth of the Tumbes Eiver. 



Head 3.78 in length ; depth of body 2.17 ; D. 89 ; A. 68 ; scales 44(2) . 



Snout without spine 4.27 in head (measured from upper eye) ; 

 eyes equal, 5.87 in head ; interorbital space very narrow, 2.66 in eye, 

 slightly grooved and scaled on posterior portion only ; maxillary 2.54 

 in head, reaching to posterior border of pupil; jaws subequal, the 

 upper slightly projecting; teeth small, in a single series; gillrakers 

 slender, 6-|-14, the longest 2.28 in eye; dorsal beginning in advance 

 of eye, highest ray 2.76 in head; pectorals unequal, the one 'on eyed 

 side 1.78 and the other 2.47 in head; ventrals 3.13; highest anal ray 



