218 MEMOIRS OF THE CARNEGIE MUSEUM 



pectoral; nuchal plates about one-fifth wider than the plates immediately following; 



no teeth; about eight azygous plates between the dorsals, generally corresponding 



to the lateral plates; uniform slaty blue or black. 



Dorsal rounded, caudal deeply emarginate, the outer rays prolonged; other 



fins lanceolate. 



88. Hoplosternum thoracatum (Cuvier and Valenciennes). (Plate XXIV, fig. 2.) 



Callichthys thoracatus Cuvier and Valenciennes, Hist. Nat. Poiss., XV, 1840, 

 309, pi. 443 (Mana; Martinique).— Peters, MB. Akad. Wiss. Berlin, 1877, 471 

 (San Fernando de Apure).— Kner, SB. Akad. Wiss. Wien, XVII, 1855, 108 

 (Surinam). — Gunther, Catalogue, V, 1864, 228 (copied). — Jordan, Proc. 

 U. S. Nat, Mus., IX, 1886, 559 (name only). 



Callichthys [Hoplosternum) thoracatus Steindachner, " Fisch-Fauna des Cauca," 

 etc., 1880, 14 (Cauca). 



Hoplosternum thoracatum Gill, Ann. Lye. Nat. Hist. N. Y., VI, 1858, 396.— 

 Bleeker, " Silures de Suriname," 1864, 26 (Surinam). — Eigenmann and Eig- 

 enmann, Proc. Cal. Acad. Sci., (2), I, 1888, 164 (Curupira; Tabatinga; Cudajas; 

 Gurupa; Teffe; Lake Hyamary; Villa Bella; Para; Ueranduba; Porto do Moz; 

 Pernambuco; Obidos). — Eigenmann and Bean, Proc. U. S. Nat. Mus., 

 XXXI, 1907, 665 (Amazon). — Eigenmann, Repts. Princeton Univ. Exp. 

 Patagonia, III, 1910, 402. 



Callichthys longifilis Cuvier and Valenciennes, Hist. Nat. Poiss., XV, 1849, 

 317 (Cayenne). — Schomburgk, Fishes Brit. Guiana, I, 1841, 150, 151, 154, 

 drawings No. 22 (Curassarraka). — Gunther, Catalogue, V, 1864, 228 (Suri- 

 nam; River Cupai). 



Hoplosternum longifilis Gill, Ann. Lye. Nat. Hist. N. Y., VI, 1858, 396 (Trini- 

 dad).— Cope, Proc. Am. Philos. Soc, XVII, 1878, 681 (Nauta).— Bleeker, 

 "Silures de Suriname," 1864, 27 (Surinam). 



Callichthys personatus Ranzani, Nov. Com. Acad. Scient. Insti. Bonon., V, 1842, 

 322, pi. 24. 



Callichthys exaratus Muller and Troschel, in Schomburgk, Reisen, III, 1848, 630 

 (Guiana). 22 



< 'allichthys pictus Muller and Troschel, in Schomburgk, Reisen, III, 1848, 630. 



Callichthys sulcatus Kner, SB. Akad. Wiss. Wien, XVII, 1855, 110 (Rio Branco 

 and Marabitanos). 



? Callichthys chiquiios Castelnau, Anim. Am. Sud, Poiss., 1855, 38, pi. 18, fig. 2 

 (Chiquitos). 



--In the type of this species there are four azygous plates separating as many paired plates in 

 front of the second dorsal. 



