1410 Bulletin //, United States National Museuni. 



573. SAGENICHTHYS, Berg. 



Aneijlodon (Cdvier) Oken, Isis, 1182, 1817 (jaeuliden.i -= ancylodon) -, not A^icylodon lUiger, 



1811, a gemis of mammals. 

 Sageniehthys, Berg, Ann. Mus. Nac. Buenos Aires 1895, 52 (ancylodon). 



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

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

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

 species known. {6ay]'ivij, seine or net; Ix^^^'ii fmh, from the Spani.sh 

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



1794. SAtJENICHTHYS ANCYLODON (Blocli & Schneider). 

 (Pescadillo del Red.) 



Head 3i; depth 4; ej^e 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 o{ 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 | 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 inches. 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 difi'erence exists it must be sought 

 in companion of specimens in good condition. {dyHvAo<;, hooked; oSoug 

 tooth.) 



Lonchurus ancylodon. Block & Schneider, Syst. Ichth., 102, pi. 25, 1801, Surinam. 

 Ancylodon jaculidens, Cuvier &. Valenciennes, Hist. Nat. Poiss., v, 81, 1830, Cayenne; 



GuNTHER, Cat. rish., 11, 311, I860; Jordan' & Gilbert, Bull. U. S. Fiali Comni. 



1882, 111. 

 Ancylodon ancylodon. Jordan & Eigen.mann, I. c, 373, 1889. 

 Sageniehthys ancylodon, Berg, Ann. Mus. Buen. Aires 1895, ,52. 



574. NEBRIS, Cuvier & Valenciennes. 



Xebris, Cuvier & Valenciennes, Hist. Nat. Poiss., v, 149, 1830 (microps). 



Body rather elongate, tapering backward ; skull excessively cavernous, 

 soft and spongy to the touch, the interorbital space A^ery 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 fiat; slits and pores of upper jaw 



