Notes on some Sovth American Fishes. 635 



however, but 11 scales across the back between the lateral line and 

 lateral line in front of the dorsal. Scales 32—35; A. 2, 20—24. 

 Eye slightly less than interorbital. 



Tetragonopterus obsciiriis Hensel. 



Scales 5—35 to 37—4 to ventrals ; D. 10 ; A. 1 or 2, 17 or 18. Head 4— 4i ; 

 depth 2^ — nearly 3. Eye 3 in head, equal to the interorbital space. Profile 

 evenly curved. Maxillary with 1 to 3 teeth. Occipital process short, about 

 12 scales between its tip and the dorsal. 11 scales from lateral line to lateral 

 line in front of the dorsal, 9 just behind the dorsal. A distinct median series 

 of scales along the middorsal line. Ventrals reaching to vent, pectoral to the 

 ventrals. 



Color in spirits. Lower parts and sides golden, back darker not metallic in 

 color. A faint, vertical humeral spot, a silvery lateral band, a large obscure 

 spot on base of caudal peduncle extending to end of middle caudal rays. 



Five specimens from Rio Grande do Sal differ slightly from 

 typical specimens of T. fasciafus, from the same place. They 

 probably represent T. obscurus Hensel, although they do not agree 

 in the proportions. They have conspicuously larger scales, although 

 in number they do not differ greatly from typical specimens. of 

 fasciatus. The anal is shorter, and the humeral and caudal spots 

 are much less distinct. 



SalminUS CllTieri C. & V. One specimen. Rio Grande do Sul. 



Salminus cuvieri C. & V., Hist. Nat. Poiss., xxii, p. 56 ; Liitken, Velhas- 



Flodens Fiske, 1875, 227, xvi (Rio das Velhas). Steindachner, Fisch. 



f. Cauca & Fliisse bei Guayaquil, 1880, 30, pi. ix, figs. 2 — 2a (Rio das 



Velhas; Rio San Francisco). 

 Salminus hrevidens Giinther, Cat. Fish. Brit. Mus., V, 350, 1864 (Cipo River). 

 Salminus orhignyanus Hensel, Wiegm. Arch., 1868, II, 356 (Jacuhy). 



Xiptiorliamphus Jenynsii Giinther. 2 specimens. 

 CryptopS Tirescens (Val.). Many specimens. 

 CJryptops lineatlis (Miiller & Troschel). Two specimens. 



This species is well described by Miiller & Troschel, and seems 

 to me to be quite different from G. virescens. 



CarapilS fasciatus (Pallas). Three specimens. 



Jenynsia lineata (.Jenyns). 



Each jaw with a series of tricuspid incisors behind which is a broad band 

 of villiform teeth. Intestinal canal scarcely if any longer than the body. 

 Lateral line double in front, interrupted in front of the dorsal, and continued 

 on the row of scales just below. D. 9 ; A. 8 ; Lat. 1. 29, 28. Anal of the 



