VI. NEW AND RARE FISHES FROiM SOUTH AMERICAN 



RIVERS.* 



By Carl H. Eigenmann. 



(Plates XIII-XVI.) 



Several species of fishes have recently been described by myself, 

 without figures {Indiana University Studies, Nos. 20 and 23) and by 

 Fowler^ {Proceedings of the Academy of Natural Sciences of Philadel- 

 phia). Fowler's species were for the most part based on small speci- 

 mens. The notes and figures here given are intended to supplement 

 these descriptions. This paper also includes the description of a new 

 species of Characin, Stethaprion crenatus, and of seven new species of 

 Nematognaths. The latter will be figured and more fully described 

 in a forthcoming report upon the fishes collected in Colombia. 



I. Agonlates anchovia Eigenmann. (Plate XIII.) 



The description in the Indiana University Studies, No. 20, 1914, 

 p. 46, is herewith given and supplemented by a figure of the type,. 

 No. 5216 C. M., from Villa Bella on the Amazon (Plate XIII) 

 and by the accompanying figure which shows the dentition of both the 

 upper and lower jaws, greatly enlarged. The original description is. 

 as follows: 

 5216, C. M., Type 127 mm., 5217 C. M. Paratypes, nine, 87-10? 



mm. Villa Bella. Haseman. 



Head 5; depth 4.75-5; D. ii; A. 31-34; scales 5-45 to 48-4; eye 1.25 

 in snout, 4.2 in head, 0.8 in interorbital. 



Long and slender; head compressed, anchovy-like; preventral area 

 keeled, prepectoral ridge being very sharp; predorsal area rounded, 

 without a complete median series of scales; dorsal profile nearly straight 

 from tip of snout to dorsal; ventral profile regularly arched from the 

 chin to the ventrals; occipital process about 13 in the distance from 



* Contribution from the Zoological Laboratory of Indiana University, No. 144^ 

 1 Gymnocorymbus nemopterus Fowler, Proc. Acad. Nat. Sci. Phila., 1914, p. 247. 



is a synonym of Ephippocharax orbicularis (Valenciennes). Astyanax rupununi 



Fowler is a synonym of A. biinaculatus. 



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