Collected by Charles Frederick Hartt. 297 



Pjjdopridis fumarhiii Miill. & Trosch., 1. c. p. 35, tab. 9, !!):•■ 2; Kner. 

 Deukschr. Acad. Wiss. Wien, XVIII., 35, 1858 (Rio Branco). 



Ten specimens fi'om the Lower Amazons. 



151. Pygopristis serrulatiis Cuv. & Yal. 



Cuv. & Val., XXII., 300; Casteln. Anim. Amer Sud. Poiss., pi. 38, fig. 3, 

 1855 (Aragnay; Amazon); Giiuther, Cat. Fish. Brit. Mus., Y., 367, 1864; 

 Eigeiim. & Eigeiim., Proe. U. S. Nat. Mus., XIV., 59, 1891. 



Brazil (one specimen). 



152. Pygoceiitriis piraya (Cuvier). 



Piranha Marcgi'. Hist. Nat. Bras., p. 69, 1848. 



Sermsalmo piraya Cuv. Mem. Mus., V., 368, pi. 28, fig. 4 (bad); Giiuther, 

 Cat. Fish. Brit. Mus., V., 368, 1864 (Brazil; River Capin; Demerara). 



Pygoceninis piraya Miill. & Trosch., Hor. R'hth. I., 20 (Brazil, Guiana); 

 Cuv. & Val. XXII., 291; Kner, Denkschr. Acad. Wiss. Wien, XVIII. , 36, 

 1858; Eigenm. & Eigenm., Proc. U. S. Nat. Mus., XIV., 59, 1891. 



Serrasahno piranha Spix, Pise. Bras. p. 71, tab. 28, 1829 iSan Francisco 

 River) ; Schomburgh, Fish Guiana I., 223, pi. XVI., 1841 CBranco). 



Serramlmo nigricans Spix, 1. c, p. 72, tab. 30 (Young?) (Equatorial rivers 

 of Bi-azil). 



Trocera on Tocantins, one specimen ; Brazil, five specimens. 

 In the 3'onnger specimens the second infraorbital is separated 

 somewhat from the preopercnlar limb by a naked strip of skin, 

 while in the older ones it is not thus separated. 



153. Pygocentrus fiicapularis (Giinther). 



Serrasalmo scaptilarin Giinther, Cat. Fish. Brit. Mus., Y., 368, 1864 (Esse- 

 quibo River). 



Pygocentrus scajmhiris Eigenm. & Eigenm., Proc. U. S. Nat. Mus., XIY., 

 .59, 1891. 



Marajo, one specimen. 



154. Serra!>ialiiiiis marginatum Valenciennes. 



Valenc, in D. Orb. Voy. Amer. Merid. Poiss., pi. 10, fig. 1, 1847 ; Cuv. & 

 Val., XXIL, 277 (Goyaz) ; Kner, Denkschr. Acad. Wiss. Wi'en, XVIII. , 32, 

 1858 (Guapore ; Cujaba) ; Giinther, Cat. Fish. Brit. Mus., V., 370, 1864 ; id. 

 Ann. & Mag. Nat. Hist., 1880 (La Plata) ; Eigenm. & Eigenm., Proc. U. S. 

 Nat. Mus., XIY., 60, 1891. 



One specimen from Brazil. 



155. Serrasalmiis tiipilopleura Kner. 



Serraufdnio aureus Spix, Pise. Bras., 72, tab. 29, 1829 (Brazil) ; Cuv. & 

 Val., XXIL; 282, 1848; Castelnau, Anim. Amer. Sud. Poi.ss., 71, 1855 



Annals N. Y. Acad. Sci., VIII,, Feb., 1895—21 



