1416 Bulletin 4.7 , United States National Museum. 



573. SAGENICHTHYS, Berg. 



Ancylodon (CuviER) Oken, Isis, 1182, 1817 (jaculidens ancylodon) ; not Ancylodon Illiger, 



1811, a genus of mammals. 

 Sagenichthys, BERG, Ann. Mus. Nac. Buenos Aires 1895, 52 (ancylodon). 



This genus is close to Cynoscion, differing mainly in the form of its 

 canines, which are lance-shaped, widened toward the tip, then abruptly 

 narrowed ; lateral teeth larger than in Cynoscion. South American ; 2 

 species known, (tiayr'fry, seine or net; ixv$, fish, from the Spanish 

 name Pescadillo del Red, the most valuable fish netted in Uruguay.) 



1794. SAGENICHTHYS ANCYLODON (Bloch <fc Schneider). 



(PESCADILLO DEL RED.) 



Head 3; depth 4; eye 6^ in head. D. IX-I, 27 or 28; A. II, 10; scales 

 75 (pores), 85 rows. Body oblong, moderately compressed, the general 

 form of species of Cynoscion ; mouth oblique, the lower jaw projecting; 

 maxillary moderate, 2 in head ; snout rather pointed, 4| in head ; preor- 

 bital narrow; large canine of upper jaw very long, lance-shaped, i. e., 

 widened toward the tip and then abruptly pointed ; about 2 canines in 

 front of lower jaw on each side, also lance-shaped, but much smaller; 

 outer teeth of upper jaw enlarged and showing something of the same 

 form; enlarged lateral teeth of lower jaw compressed; gill rakers mod- 

 erate, slender, 3+8, the longest f eye; caudal fin rhombic; spinous dorsal 

 very weak; soft dorsal and anal scaly; pectoral If in head; lateral line 

 becoming straight before vent. Color bluish above, silvery below, some- 

 times with dark streaks along the rows of scales; caudal lobe darker, 

 sometimes black. Length 15 injches. Sandy coast of tropical America, 

 both Pacific and Atlantic; common from Guiana southward to Uruguay 

 and Argentine ; also common about Panama; a most excellent food-fish. 

 Here described from a specimen from Rio Grande do Sul. Specimens from 

 Panama agree in every respect. If any difference exists it must be sought 

 in companion of specimens in good condition. (aynvAog, hooked; odovg 

 tooth.) 



Lonchurus ancylodon, BLOCH & SCHNEIDER, Syst. Ichth., 102, pi. 25, 1801., Surinam. 

 Ancylodon jaculidens, CUVIER & VALENCIENNES, Hist. Nat. Poiss., v, 81, 1830, Cayenne; 



GUNTHER, Cat. Fish., n, 311, I860; JORDAN & GILBERT, Bull. U. S. Fish Comm. 



1882, 111. 



Ancylodon ancylodon. JORDAN &. EIGENMANN, I. c., 373, 1889. 

 Sagenichthys ancylodon, BERG, Ann. Mus. Buen. Aires 1895, 52. 



574. NEBRIS, Cuvier & Valenciennes. 

 Nebris, CUVIER & VALENCIENNES, Hist. Nat. Poiss., v, 149, 1830 (micropn), 



Body rather elongate, tapering backward ; skull excessively cavernous, 

 soft and spongy to the touch, the interorbital space very broad; mouth 

 large, the lower jaw projecting; teeth subequal, in narrow bands; eye 

 very small; preopercle with a broad membranaceous border, which is stri- 

 ated and fringed; preorbital narrow and flat; slits and pores of upper jaw 



