eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 183 



Pimelodus fasciatum Lacepede, Hist. Nat. Poiss., V, 1803, 94, 99, 100. 



Platystoma fasciatum Cuvier and Valenciennes, Hist. Nat. Poiss., XV, 1840, 14 

 (copied).— Kner, SB. Akad. Wiss. Wien, XXVI, 1857, 401 (Surinam) .- 

 Gunther, Catalogue, V, 1864, 107 (Essequibo; Surinam; River Capin, Para). — 

 Peters, MB. Akad. Wiss. Berlin, 1877, 469 (Calabozo). — Steindachner, 

 "Fisch-Fauna Magdalenen-Stromes," 1878, 15 (Magdalena River). — Cope, 

 Proc. Am. Philos. Soc, XVII, 1878, 674 (Peruvian Amazon). — Stein- 

 dachner, "Fisch-Fauna des Cauca," etc., 1880, 5 (Cauca); "Icthyologische 

 Beitriige," viii, 54 (Surinam); "Flussfische Siidamerika's," iv, 1882, 4 (Rio 

 Amazonas; Iquitos). 



Pseudoplaty stoma fasciatum Bleeker, Nederl. Tijdschr. Dierk., I, 1863, 97 

 (name only); "Silures de Suriname," 1864, 72 (Surinam). — Eigenmann 

 and Eigenmann, Proc. Cal. Acad. Sci., (2), I, 1888, 138 (Obidos; Coary; 

 Hyavary); Occasional Papers Cal. Acad. Sci., I, 1890, 208. — Steindachner 

 and von Bayern, Denkschr. Akad. Wiss. Wien, LXXII, 1902, 136 (Rio 

 Lebrija, Colombia). — Eigenmann, Repts. Princeton Univ. Exp. Patagonia, 

 III, 1910, 39. 



Platystoma truncaium Agassiz, Selecta Gen. et Spec. Pise. Bras., 1829, 27, pi. 13a 

 (Rio Japura and Solimoens). — Cuvier and Valenciennes, Hist. Nat. Poiss., 

 XV, 1840, 20 (Brazil).— Hyrtl, Denkschr. Akad. Wiss. Wien, XVI, 1859, 

 17 (vertebra? 13 + 33).— Gunther, Catalogue, V, 1864, 108 (copied). 



Platystoma tigrinum (not of Cuvier and Valenciennes) Schomburgk, Fishes Brit. 

 Guiana, 1, 1841, 185 (most of the rivers). — Muller and Troschei., in Schom- 

 burgk, Reisen, III, 1848, 627 (nearly all rivers). 



Platystoma pimctifcr Castelnau, Anim. Am. Sud, Poiss., 1855, 40, pi. 19, fig. 2 

 (Amazon). 

 Four specimens, 245-295 mm. Rupununi Pan. (C. M. Cat, No. 1699a; I. U. 



Cat. No. 12082.) 



One specimen, 455 mm. Wismar. (C. M. Cat. No. 1295.) 



Head 2.66-2.75; depth 6.5-7.25; D. 1,6; A.ll-14; eye 6 in snout, 12 in head, 2.5 



in interorbital. 



Snout much depressed; body slender, subterete at the dorsal; groove of the 



fontanel not continued to the occipital process; a deep groove across the head at 



base of the occipital process; maxillary barbel reaching to near tip of dorsal. 



Dorsal spine nearer tip of adipose than to tip of snout. 



Dark brown above, abruptly white on the lower part of the sides; about ten 



black cross-bands, margined with white in front; some dark spots along the line of 



