396 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



KEY TO THE SPECIES 



a. Dorsal fin usually with 13 soft rays (rarely with 12 or 14); scales (or pores) 

 in lateral line 63 to 75. 



b. Pectoral with 15 rays (rarely with 16); scales in lateral line larger than 



adjacent ones, especially in curved part, 68 to 75 in lateral line, 90 to 

 105 just above it, about 14 or 15 oblique rows between lateral line and 



sixth dorsal spine; teeth on vomer in a band philippii (p. 396) 



bb. Pectoral with 14 rays; scales in lateral line not much larger than adjacent 

 ones, 63 to 68 in lateral line, 65 to 73, just above it, 7 or 8 oblique rows 

 between lateral line and sixth dorsal spine; teeth on vomer in a single 



series xanti (p. 398) 



aa. Dorsal fin with 11 soft rays; scales (or pores) in lateral line 57 to 62. 



c. Dorsal fin with 19 spines, its spinous part with two indentations, the third 



and the fifteenth and sixteenth spines shorter than the others; jaws with 

 a single series of teeth; pectoral with 14 to 15 rays. 



afuerae, new species (p. 400) 



cc. Dorsal fin with 24 or 25 graduated spines, its spinous part being unindented; 



jaws with an outer series of large teeth followed by a band of minute 



ones; pectoral with 13 rays microcirrhis (p. 401) 



LABHISOMUS PHIUPPU (Steindachner) 



Trambollo; Chalapo 

 Figure 76 



Clinus philippii Steindachner, 1866, p. 3, West Coast of South America (orig- 

 inal description). 



Clinus fortidentatus Cope, 1877, p. 26, Callao Bay, Peru (original description). 



Labrisomus philippi Abbott, 1899, p. 361, Callao, Peru (note on food eaten). — 

 Starks, 1906, p. 800, Callao, Peru (enumeration of fin rays; notes on varia- 

 tion). 



Lepisoma philippi Evermann and Radcliffe, 1917, p. 144, pi. 13, fig. 1, Chim- 

 bote, Callao, Chincha Island, Ballestas Island, and Independencia Bay, 

 Peru (synonymy ; description; compared with Lepisoma xanti and L. jenkinsi). 



Head 3.1 to 3.6; depth 3.1 to 4.1; D. XVIII or XIX, 13 (occasion- 

 ally 12, rarely 14); A. II, 19 (occasionally 18 or 20); P. 15 (rarely 16); 

 scales (pores) in lateral line 68 to 75, just above lateral line about 90 

 to 105; vertebrae 35 (one specimen dissected). 



Body elongate, moderately compressed, its greatest thickness about 

 two-thirds its depth; head moderately low, tapering to a rather 

 pointed snout in small specimens, becoming much deeper and blunter 

 with age, broader than anterior part of trunk; caudal peduncle short, 

 compressed, 3.1 to 3.6 in head; snout pointed in small examples, 

 quite blunt in large ones, 2.5 to 3.4 in head; eye 4.0 to 6.1 ; interorbital 

 increasing greatly in width with age, 4.6 to 11; mouth large, slightly 

 oblique, terminal or nearly so; maxillary reaching anterior margin of 

 pupil in small examples, to or beyond posterior margin of pupil in 

 larger ones, 1.75 to 2.5 in head; teeth in each jaw in an outer series, 

 consisting of rather strong teeth, followed anteriorly by a band of 

 minute teeth; those on vomer and palatines in bands, the outer ones 

 on vomer little enlarged; anterior nostril with a tuft of about 6 to 12 



