eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 305 



twenty-fifth to twenty-eighth, a 



third on the thirtieth to thirty- 

 second, and a dark spot on the 



base of the caudal; a faint band 



from the thirteenth scale to the 



end of the lateral line. 



The lateral band and unequal caudal lobes are still quite marked in a specimen 

 of friderici 152 mm. and another 250 mm. from Tumatumari, as well as in the 

 specimens recorded under that species from Kangaruma, Rockstone, and Crab 

 Falls. 



In a specimen 215 mm. long from Tumatumari the caudal lobes are equal, and 

 there is but one spot from the thirteenth to the fifteenth scale of the lateral line. 

 In the specimens from about Wismar the lateral band is not seen, even in small 

 specimens, but the caudal lobes are unequal. 



160. Leporinus maculatus Midler and Troschel. (Plate XLIII, fig. 2.) 



"Wacucu" of the Indians about the Kaieteur. 



Leporinus maculatus Muller and Troschel, Horse Ichth., I, 1845, 11 (Guiana); 



in Schomburgk, Reisen, III, 1848, 634 (Rupununi; Awaricuru) .—Eigenmann, 



Repts. Princeton Univ. Exp. Patagonia, III, 1910, 427. 

 Leporinus megalepis Gunther, Ann. and Mag. Nat. Hist., (3), XII, 1863, 443 



(Essequibo); Catalogue, V, 1864, 307, part (Essequibo; River Cupai; Bahia; 



Rio Janeiro); Proc. Zool. Soc. London, 1868, 244 (Xeberos). — Cope, Proc. 



Acad. Nat. Sci. Phila., 1871, 259 (Ambyiacu). — Steindachner, "Fisch-fauna 



d. Magdalenen-Stromes," 1878, 38, note. — Eigenmann and Eigenmann, Proc. 



U. S. Nat. Mus., XIV, 1891, 51.— Vaillant, Bull. Mus. d'Hist. Nat., V, 1899, 



155 (Carnot).— Eigenmann and Ogle, Proc. U. S. Nat. Mus., XXXIII, 1907. 



7 (Rio das Velhas). — Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 



1910, 426. 

 Leporinus marcgravii Lutken, Overs. Dan. Vidensk. 'Selsk. Forh., 1874, 130 (Rio 



das Velhas and tributaries); Dan. Vidensk. Selsk. Skr., (5), XII, 1875, 202. 



pi. 4, fig. 9; and p. xii (Rio das Velhas). 



Ten specimens, 99-146 mm. Tukeit. (C. M. Cat. No. 1833a-c; I. U. Cat. 

 No. 12123.) 



Twelve specimens, 58-73 mm. Amatuk. (C. M. Cat, No. 1834a-c; I. U. 

 Cat, No. 12124.) 



Seven specimens, 90-129 mm. Creek below Potaro Landing. (C. M. Cat, 

 No. 1835a-6; I. U. Cat, No. 12125.) 



