THE AMERICAN TETRAGONOPTERINAE. 249 



on the caudal and continued to the end of about four rays, tapering forward 

 traceable in favorable cases to below the dorsal as a dark streak in the middle 

 of the lateral band; a dusky streak extending up and down from the humeral 

 spot and another one parallel with it about three scales behind the himieral 

 spot; the latter markings prominent in formalin specimens. 



These specimens while quite different from some of the specimens of A. 

 bimaculatus are similar to other specimens. They can be distinguished certainly 

 only by the increased number of scales and even in this character they overlap 

 typical specimens of A. himaculatus. 



15. ASTYANAX (POECILURICHYHYS) BIMACULATUS (Liune). 



Plate 62, figs. 1, 2, 4, and 6; Plate 95, fig. 6. 



Charax no. 54, Gronovius, Mus. ichthyol., 1754, 1, p. 19, tub. 1, fig. 5. 



Albula maculala Linne, Museum Adolphi Frideric, 1754, p. 78, tab. 32, fig. 2. 



Tetragonoptefus maculatus Muller & Tboschel, Horac ichthyolngicae, 1845, 1, p. 14, tab. 3, fig. 4; 

 Fische Britisch Guiana, 1848, p. 634 (Rupununi; Es.sequibo); GtJNTHER, Cat. fishes Brit, mus., 

 1864, 5, p. 321 (Demerara; River Capin; Pemambuco); Steindachner, Siisswf. stidostl. Bras., 

 1876, 3, p. 568, pi. 1, fig. 2 (Rio Paraliyba; Rio Doce; Rio Mucuri); Peters, Monatsb. Al^ad. 

 wiss. Berlin, 1877, p. 472 (Calabozo); Boulenger, Ann. mag. nat. hist., 1887, ser. 5, 19, p. 173 

 (Rio Grande do Sul); Eigenm.vnn & Eigenm.\nn, Proc. U. S. N. M., 1891, 14, p. 52; Ulrey, Ann. 

 N. Y. acad. sci., 1895, 8, p. 275; Perugia, Ann. Mus. civ. storia nat. Geneva, 1891, ser. 2a, 10, p. 43 

 (Rio Paraguay; Asuncion and Villa Maria); Boulenger, Boll. Mus. univ. Torino, 1895, 10, p. 3 

 (Colonia Risso); Pellegrin, Bull. Mus. hist, nat., 1899, 5, p. 157 (Apure); Regan, Proc. Zool. see. 

 Lond., 1906, p. 384 (Trinidad). 



Salmo bimaculatus Linne, Syst. nat., 1758, ed. 10, 1, p. 311; 1766, ed. 12, p. 513 (South America); Bloch, 

 Aasliindische fische, 1794, 8, p. 110, taf. 382, fig. 2; Bloch, Systema ichthyologicae, ed. Schneider, 

 1801, p. 413. 



Charax bimaculatus Gronow, Syst. ichthyol., ed. Gray, 1854, p. 154. 



Astyanax bimaculatus Fowler, Proc. Acad. nat. sci. Phil., 1906, p. 432 (Peruvian Amazon; Headwaters 

 of the Tocantius); Eigenmann and Ogle, Proc. U. S. N. M., 1907, 33, p. 27, in part (Para; British 

 Guiana); Eigenmann, Rept. Princeton univ. exped. Patagonia, 1910, 3, p. 432; Mem. Carnegie 

 mus., 1912, 5, p. 359. 



Tetragonopterus linnaci Ctjvier & Valencienne.s, Hist. nat. poissons, 1848, 22, p. 142 (Cayenne). 



Tetragonopterus gronovii Cuv. & Val., Loc. cit., p. 143 (Surinam); Kner & Steindachner, Abhandl. 

 Bayer, akad. wiss., 1864, 10, p. 46 (Rio Bayano). 



Tetragonopterus orbignianus Cuv. & Val., Loc. cit., p. 147 in part (Buenos Aires). 



Poecilurichthys brevoorlii Gill, Ann. Lye. nat. hist. N. Y., 1858, 6, p. 57 (Trinidad); Gunther, Cat. 

 fishes Brit, mus., 1864, 5, p. 317. 



Tetragonopterus bartletti Gunther, Ann. mag. nat. hist., 1865, ser. 3, 18, p. 30 (Upper Amazon); Cope, 

 Proc. Acad. nat. sci. Phil., 1871, p. 260 (Ambyiacu). 



Astyanax bartletti Fowler, Proc. Acad. nat. sci. Phil., 1906, p. 343, fig. 31 (Ambyiacu). 



Tetragonopterus orientalis Cope, Proc. Amer. philos. soc, 1870, 11, p. 559 (Para); Eigenmann & Eigen- 

 mann, Proc. U. S. N. M., 1891, 14, p. 54; Ulrey, Ann. N. Y. acad. sci., 1895, 8, p. 279. 



Astyanax orientalis Fowler, Proc. Acad. nat. sci. Phil., 1906, p. 434, fig. 35. 



Astyanax microstoma Hensel {nmi Giinther) Wiegm. archiv., 1870, p. 83. 



Tetragonopterus caudimaculatus Cope, Proc. Amor, philos. soc, 1894, 33, p. 107 (Headwaters uf Tocan- 

 tins). 



Tetragonopterus jacuhiensis Cope, Proc. Amer. philos. soc, 1894, 33, p. 88 (Rio Grande do Sul); Ulrey, 

 Ann. N. Y. acad. sci., 8, 1895, p. 280; Fowler, Proc Acad. nat. sci. Phil., 1906, p. 435 (Jacuhy). 



