eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 215 



Callichthys Linnaeus. 

 Callichthys Linn.eus, Amoen. Acad., I, 1754, 317. — Cuvier and Valenciennes, 



Hist, Nat. Poiss., XV, 1840, 294 (asper = callichthys). — Bleeker, Nederl. 



Tijdschr. Dicrk., I, 1863, 82 (tamoata = callichthys) . 

 Cataphractus Bloch, Ausl. Fische, VIII, 1794, 80 (preoccupied in mammals). — 



Lacepede, Hist. Nat, Poiss., V, 1804, 124 (callichthys). — Swainson, Class. 



Fishes, Amph., and Rept., II, 1839, 304 (depressus = callichthys). 



Type, Silurus callichthys Linnaeus. 



Characters given in the key to the genera. 



86. Callichthys callichthys Linnaeus. 



Callichthys tamoata Linnaeus, Mus. Adolphi Fred., 1754, 731. — Bleeker, " Silures 

 de Surlname," 1864, 22 (Surinam). 



Silurus callichthys Linnaeus, Syst. Nat,, ed. 10, I, 1758, 307 (America); ed. 12, 

 I, 1766, 506.— Gmelin, Syst. Nat., I, iii, 1788, 1361. 



Cataphractus callichthys Eigenmann and Eigenmann, Proc. Cal. Acad. Sci., (2), I, 

 1888, 164 (Rio Janeiro; Pernambuco; Juiz de Fora; Bahia; Mendez; Macacos; 

 Porto Seguro; Surinam). 



Callichthys callichthys Eigenmann and Eigenmann, Occasional Papers Cal. Acad. 

 Sci., I, 1890, 452. — von Ihering, Siisswasserfische d. Rio Grande do Sul, 1893, 

 21.— Eigenmann, Ann. N. Y. Acad. Sci., VII, 1894, 633 (Rio Grande do Sul) — 

 Lahille, Rev. Mus. de la Plata, VI, 1895, 272 (Puerto Viejo). — Pellegrin, 

 Bull. Mus. d'Hist, Nat., 1899, 158 (Apure). — Eigenmann, Ann. Carnegie 

 Mus., IV, 1907, 123 (Bahia Negra); Repts. Princeton Univ. Exp. Patagonia, 

 III, 1910, 402. 



Callichthys asper Quoy and Gaimard, Voy. Uranie et Physicienne, Zool., 1824, 

 232. — Cuvier and Valenciennes, Hist. Nat. Poiss., XV, 1840, 302 (Cayenne; 

 Rio Janeiro).— Kner, SB. Akad. Wiss. Wien, XVII, 1855, 107 (Para Rio; 

 Surinam; Bahia). — Castelnau, Anim. Am. Sud, Poiss., 1855, 38 (Bahia; name 

 only). — Bleeker, Ichth. Arch. Ind. Prodr., I, 1858, 53. — Gunther, Catalogue, 

 V, 1864, 226 (Bahia; Para).— Cope, Proc. Am. Philos. Soc, XVII, 1878, 

 681 (Nauta).— Perugia, Ann. Mus. Genova (2), X, 1891, 636 (Chaco 

 Centrale) . 



Cataphractus depressus Swainson, Class. Fishes, Amph., and Rept.", II, 1839, 304 

 (based on Bloch, pi. 377). 



Callichthys ccelatus Cuvier and Valenciennes, Hist. Nat. Poiss., XV, 1840, 308 

 (Rio Janeiro). — Muller and Troschel, in Schomburgk, Reisen, III, 1848, 

 630 (trenches). — Gunther, Catalogue, V, 1864, 227 (copied). 



