Jordan and Evermann, Fishes of North America. 437 



deeply forked. Tropical parts of the Pacific. (oKiade, behind; Trrfpov, 

 fin, the dorsal being placed farther backward than in Pristigaster.) 



a. Anal rays 53 ; eye 2% in head. LUTIPINNIS, 711. 



aa. Anal rays 56 ; eye 3% in head ; dorsal nearer root of caudal than scapula. DOVII, 712. 



oaa. Anal rays 61 , eye 3 in head ; dorsal midway between scapula and root of caudal. 



MACROPS, 713. 



711. OPISTHOPTERUS LUTIPINNIS (Jordan & Gilbert). 



Head 4* ; depth 3* ; eye 2*. D. 13 ; A. 53 ; scales 44-11 ; scutes 29. 

 Body elongate, strongly compressed, anterior profile straight. Mouth 

 large, very oblique, the lower jaw longest ; maxillary a little more than 

 half head. Teeth rather strong, present on most bones of the head 

 except the vomer. Eye very large. Gill rakers about 18, not longer 

 than pupil. Dorsal small, posterior, slightly nearer base of caudal than 

 occiput ; pectorals long, nearly as long as head ; anal moderate. Scales 

 thin, deciduous ; ventral scutes very strong. Greenish, sides golden- 

 silvery, fins mostly yellow ; a black spot on preopercle and a very dis- 

 tinct humeral spot. Length 6 inches. Pacific coast of Mexico, rather 

 scarce at Mazatlan. (luteus, yellow ; pinna, fin.) 



Pristigaster Ixtipiimis, JORDAN & GILBERT, Proc. U. S. Nat. Mus., 1881, 340, Mazatlan. (Type, 

 Nos. 28126, 28209, and 28320. Coll. Gilbert.) 



712. OPISTHOPTERUS DOVII (Giinther). 



Head 4f; depth 3i; eye 3. D. 11; A. 56; scales 51-13. Maxillary 

 less than half head, its supplemental bone moderate, reaching end of the 

 bone. Insertion of dorsal considerably nearer root of caudal than scapula. 

 Panama. (Giinther.) (Named for Capt. John M. Dow, formerly resident 

 at Panama, and who made large collections of fishes for the British 

 Museum and for the Smithsonian Institution.) 



Pristigaster dovii, GUNTHER, Cat., vn, 461, 1868, Panama. (Coll. Capt. Dow.) 

 713. OPISTHOPTERUS MACROPS (Gunther). 



Head 4| ; depth 3 ; eye 3. D. 13 ; A. 61 ; scales 53-17. Dorsal inserted 

 midway between scapula and root of caudal. Maxillary less than half 

 head, its supplementary bone narrow, extending to its extremity. 

 Silvery, scapula black. Panama. (Gunther.) (/i/a/cpof, large; wi/;, eye.) 



Pristigaster macrops, GUNTHER, Proc. Zool. Soc., 1866, 603, and Cat., vn, 461, 1868, Panama. 

 (Coll. Salvin.) 



216. ODONTOGNATHUS, Lacepede. 



Odontognathus, LAC&PEDE, Hist. Nat, Poiss., n, 221, 1799, (mucrvnatus). 

 Gnathobohis, BLOCH & SCHNEIDER, Syst. Ichth., 556, 1801, (mucronatus). 



Body rather elongate, compressed, covered with caducous scales. Ven- 

 tral outline not prominent, covered with sharp scutes. Dorsal fin small, 

 much behind front of the long anal. Maxillary very long, in the adult, 

 extending beyond eye, shorter in the young. Teeth small. One species 

 known, (odoi/f, tooth; yvdtioc, jaw.) 



