394 MEMOIRS OF THE CARNEGIE MUSEUM 



Myleus setiger Muller and Troschel, Horse Ichth., I, 1845, 39, pi. 11, fig. 1 — Ih 

 (Essequibo; Santarem); in Schomburgk, Rcison, III, 1848, 638 (Essequibo 

 below the cascades). — Eigenmann, Repts. Princeton I'niv. Exp. Pagatonia, 

 III, 1910, 443. 



Myletes setiger Kner, "Familic der Characinen," ii, 1859, pi. 2, fig. 6 (Matto 

 Grosso). — GiJNTHER, Catalogue, V, 1891, 378 (British Guiana). — Eigenmann 

 and Eigenmann, Proc. U. S. Nat. Mus., XIV, 1891, 61. 



Myletes schomburgkii (not of Jardine) MIjller and Troschel, Horse Ichth., I, 

 1845, 37. — MtJLLER and Troschel, in Schomburgk, Rcisen, III, 1848, 637 

 (Rupununi; Takutu; Zuraima; Savannah swamps). — GtJNTHER, Catalogue, V, 

 1864, 372, part. — Eigenmann and Eigenmann, Proc. U. S. Nat. Mus., XIV, 

 1891, 60. — Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 443. 



Myletes dwaricatus Cuvier and Valenciennes, Hist. Nat. Poiss., XXII, 1848, 215 

 (Essequibo). — Kner, "Familie der Characinen," ii, 1859, 15. — Gunther, 

 Catalogue, V, 1864, 376. 



Myletes diodyxodon Cuvier and Valenciennes, Hist. Nat. Poiss., XXII, 1848, 

 222. — Castelnau, Anim. Am. Sud, Poiss., 1855, pi. 34, fig. 1 (Amazon). 



Tometes trilobatus Cuvier and Valenciennes, Hist. Nat. Poiss., XXII, 1848, 226 

 (Cayenne). 



Myletes trilobatus GtJNTHER, Catalogue, V, 1864, 377. — Eigenmann and Eigen- 

 mann, Proc. U. S. Nat. Mus., XIV, 1891, 61. 



Myletes filosiis (ex Heckel, MS.) Kner, "Famihe der Characinen," ii, 1859, 19. 

 Schomburgk preserved no specimen of his "Pacu" to serve as the type for this 



species. There is, however, no doubt about what fish he figured and dcsci'ibed. 



Muller and Troschel, whose specimens I have examined, described the male of 



this species as Myleus setiger and referred the female to Schomburgk's schomburgkii, 



which is quite a different fish. 



I have also examined the various types of Cuvier and Valenciennes. The type of 



Myletes divaricatus is undoubtedly, and that of Tometes trilobatus is very probably, 



also of this species. Both types are dried, divaricatus apparently a half skeleton 



while trilobatus is a stuffed skin. They may or may not have their original 



shape. The depth is 2 in the length without the snout in one, and 2 without the 



snout and eye in the other. 



This is the most famous of the food-fishes of Guiana. It is abundant about 



the falls, where it feeds on the weeds growing on the rocks. 



Four specimens, one female, 515 mm., and three males, 490-563 mm. Falls of 



the Mazaruni. Mr. Fowler. (C. M. Cat. Nos. 2491 and 2492.) 



