EIGENMANN: the freshwater fishes of BRITISH GUIANA 359 



fifth scale of the line; a dark vertical bar crossing the opercle, followed by a light 

 bar, a second dark bar across the posterior part of the humeral spot, a second 

 light bar and then a third dark l)ar, shading into the i^rofusely dotted sides. 

 Cheeks profusely dotted; a dark median line, most prominent in young speci- 

 mens preserved in formalin, this line 7iot extending along the sides of the caudal 

 peduncle; a black spot at the base of the caudal, its margins shading into the dusky 

 caudal, but not definitely continued to the end of the middle rays. These markings 

 fade with age. In life all fins but the pectorals are tinged with orange or brick-red. 



218. Poecilurichthys bimaculatus (Linnaeus). 



"Charax" No. 54, Gronow, Mus. Ichth., I, 1754, 19, pi. 1, fig. 5. 



Albula maculata Linn^us, Mus. Adolphi Fred., 1754, 78, pi. 32, fig. 2. 



Tetragonopterus maculatus Muller and Troschel, Horse Ichth., I, 1845, 14, part, 

 pi. 3, fig. 4; in Schomburgk, Reisen, III, 1848, 634, part (Rupununi; Essequibo). 

 — GuNTHER, Catalogue, V, 1864,321 (Demerara; River Capin; Pernambuco). 

 — Steindachner, " Stisswasserfische d. Stidostlichen Brasilien," iii, 1876, 568, 

 pi. 1, fig. 2 (Rio Parahyba; Rio Doce; Rio Mucuri). — Peters, MB. Akad. 

 Wiss. Berlin, 1877, 472 (Calabozo). — Boulenger, Ann. and Mag. Nat. Hist., 

 XIX, 1887, 173 (Rio Grande do Sul). — Eigenmann and Eigenmann, Proc. 

 U. S. Nat. Mus., XIV, 1891, 52.--Ulrey, Ann. N. Y. Acad. Sci., VIII, 1895, 

 275. — Perugia, Ann. Mus. G'enova, (2a), X, 1891, 43 (Rio Paraguay; Asun- 

 cion; Villa Maria). — Boulenger, Boll. Mus. Zool. ed. Anat. Comp. Torino, X, 

 1895,3 (Colonia Risso) .— Pellegrin, Bull. Mus. d'Hist. Nat., V, 1899, 157 

 (Apure).— Regan, Proc. Zool. Soc. London, 1906, 384 (Trinidad). 



Salmo bimaculatus Linn^us, Syst. Nat., ed. 10, 1758, 311, No. 20; ed. 12, 1766, 513 

 (South America). — Bloch, Ausl. Fische, 1794, pi. 382, fig. 2. — Block and 

 Schneider, S.yst. Ichth., 1801, 413. 



Charax bimaculatus Gronow, Cat. Fish, ed. Gray, 1854, 154. 



Astyanax bimaculatus Fowler, Proc. Acad. Nat. Sci. Phila., 1906, 432 (headwaters 

 of the Tocantins). — Eigenmann and Ogle, Proc. U. S. Nat. Mus., XXXIIL 

 1907, 27, part (Para; British Guiana). — Eigenmann, Repts. Princeton Univ. 

 Exp. Patagonia, III, 1910, 432. 



Tetragono-pterus linncei Cuvier and Valenciennes, Hist. Nat. Poiss., XXII, 1848, 



142 (Cayenne). 



Tetragonopterus gronovii Cuvier and Valenciennes, Hist. Nat. Poiss., XXII, 1848, 



143 (Surinam). — Kner, "Familie dcr Characinen," i, 1859, 39. — Kner and 

 Steindachner, Abhand. K. Bayer. Akad. Wiss., II KL, X, 1864, 46 (Rio 

 Bayano) . 



