Eigenmann: The Serrasalmin/E and Mylin/E. 



237 



I. Pygopristis denticulatus (Cuvier). 



Serrasalmo denliculatus Cuvier, Mem. Mus. Paris, Vol. V, 1819, p. 371; Gunther. 

 Cat. Fish. Brit. Mus., Vol. V, 1864, p. 367 (British Guiana). 



Pygopristis denliculatus Muller & Troschel, Horse Ichthyol., Vol. I, 1845, pp 

 21 and 34, tab. ix, fig. i (Guiana); in Schomburgk, Reisen, Vol. Ill, 1848, p 

 637 (Essequibo; Takutu; Rupununi); Cuvier & Valenciennes, Hist. Nat 

 Poiss., Vol. XXII, 1848, p. 297 (Essequibo); Eigenmann & Eigenmann, Proc 

 U. S. Nat. Mus., Vol. XIV, 1891, p. 59; Ulrey, Ann. N. Y. Acad. Sci., Vol 

 VII, 1895, p. 296 (Lower Amazon); Eigenmann, Reports Princeton Univ. Exp 

 Patagonia, Vol. Ill, 1910, p. 441; Mem. Carnegie Mus., Vol. V, 1912, p. 385 

 (Lama Stop-off). 



Pygopristis fumarius Muller & Troschel, Horae Ichthyol., Vol. I, 1845, pp. 21 

 and 35, tab. 9, fig. 2; Schomburgk, Reisen, Vol. Ill, 1848, p. 637 (Rupununi; 

 Essequibo); Kner, Characinen, Vol. II, 1859, p. 27 (Rio Branco). 



1 Serrasalmo punctatus Schomburgk, Fishes Guiana, Vol. I, 1841, p. 223. 



Fig. I. Dentition of Pygopristis denticulatus (Cuvier). 



Distribution. — Guianas to Amazon. 



It is quite possible that Schomburgh's drawing represents Pristo- 

 brycon scapiilaris instead of this species. 



2. Pygopristis serrulatus Cuvier & Valenciennes. 



Pygopristis serrulatus Cuvier & Valenciennes, Hist. Nat. Poiss., Vol. XXII, 

 1848, p. 300 (Amazon); Castelnau, Anim. Amer. Sud, Poiss., 1855, pi. 38, 

 fig. 3 (Araguay; Amazon); Eigenmann & Eigenmann, Proc. U. S. Nat. Mus.; 

 Vol. XIV, 1891, p. 59; Ulrey, Ann. N. Y. Acad. Sci.. Vol. VII, p. 297 (Brazil). 

 Eigenmann, Reports Princeton Univ. Exp., Patagonia, Vol. Ill, 1910, p. 441. 



Serrasalmo serrulatus Gunther, Cat. Fish. Brit. Mus., Vol. V, 1864, p. 367. 

 Boulenger, Trans. Zool. Soc. London, Vol. XIV, 1867, p. 37 (Paraguay); Boll. 

 Mus. Univ., Torino, Vol. XII, 1897 (Mission de San Francisco). 



