222 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 

 OUGOPUTES MUNDUS Jordan and Starks 



OligopUtes mundus Jordan and Starks, in Jordan and Evermann, 1896, p. 344, 

 MazatMn, Mexico (name only); 1898, p. 2844 (original description). — Meek 

 and HiLDEBRAND, 1925, p. 389, pi. 28, fig. 2, Panama Bay (synonymy; 

 description; range). — Tortonese, 1939b, p. 338, Callao, Peru (notes). 



This species is not included in the collections studied. It is intro- 

 duced here solely on the record by Tortonese cited above, who listed 

 a single specimen from Callao. 



The elongate, strongly compressed body, covered with linear scales, 

 placed at various angles to each other, distinguishes the species of this 

 genus. 0. mundus differs from the other species in having a very large 

 mouth, with a maxillary that reaches far beyond the eye, in having 

 only seven to nine gill rakers on the lower limb of the first arch, and in 

 having numerous pores on the head leading to canals that ramify under 

 the skin. 



Range. — Baja California to Callao, Peru. 



Genus VOMER Cuvier, 1817 



Body ovate, very strongly compressed; head short and deep, its 

 anterior profile nearly vertical, more or less concave; snout projecting 

 only slightly; mouth moderate, oblique; maxillary broad, with a 

 supplemental bone; teeth minute, present on jaws, vomer, tongue, and 

 usually on palatines ; lateral line anteriorly with a high arch, its chord 

 shorter than rest of line, straight part with small bony scutes; scales 

 rudimentary, except on caudal peduncle; second dorsal and anal low, 

 without high lobes anteriorly. Anterior spines of first dorsal bearing 

 filaments, and the ventral enlarged, in very young. 



A single species comes within the scope of the present work. 



VOMER DECUVIFRONS Meek and Hildebrand 



Reloj 



Argyreiosus setipinnis GtJNTHER (in part not of Mitchill), 1860, p, 459, variety A, 



from Peru (description; specimens listed). 

 Vomer setipinnis Starks (not of Mitchill), 1906, p. 786, CcUr.o, Peru. — Regan 



(not of Mitchill), 1913, p. 278, Ferrol Bay, Peru. — Fowler (in part not of 



Mitchill), 1940b, p. 768, Brazil and Peru. 

 Vomer gabonensis Abbott (not of Guichenot), 1899, p. 347 (Guichenot's name for 



an African Vomer attached to Gunther's variety A; see references above). 

 Vomer dedivifrons Meek and Hildebrand, 1925, p. 367, pi. 29, fig. 2, Panama Bay 



(synonymy; description; compared with V. setipinnis of the Atlantic; 



range). — Walford, 1937, p. 79, pi. 55, fig. a, in color (distinguishing charac- 

 ters; size attained). 



Head 2.65 to 3.1; depth 1.33 to 1.8; D. VIII-I, 22 or 23; A. II-I, 

 17 to 19; P. 17 to 19. 



Body everywhere with sharp edges; anterior profile steep, concave 

 in front of eyes, forming an angle of about 130° in occipital region; 

 back in front of dorsal fin, straight, nearly horizontal, with three slight 

 humps in advance of dorsal; ventral margin from vent to origin of anal 



