SOUTH AMERICAN NEMATOGNATHI. 33 



One specimen is deformed, having the head greatly 

 arched, the lower jaw projecting. The label attached 

 reads: "Specimen from whose mouth two parasitic 

 crustaceans were taken." 



19, Ailurichthys bagre, 



Silurus bagre Linnaeus, Syst. Nat. Ed. xii, 505, 1766; id. Ed. xiii, 

 1360, 1788; Bloch, Ausl. Fische, 8, 27, pi. 365, 1794 (America); 

 Gmelin, Linnaeus, Syst. Nat. 270, 1818'|(Brazil and North Amer- 

 ica). 



Pimelodus bagre Lacepede, Hist. Nat. Poiss. v, 93, 98, 1803 (Brazil); 

 Bleeker, Silures de Suriname, 66, 1864 (Surinam). 



JZlurichthys bagre Jordan, Proc. U. S. Nat. Mus. 1886, 559 (name 

 only). 



Ailurichthys bagre Eigenm. & Eigenm, Proc. Cal. Acad. Sci., 2d. Ser. 

 i, 1888, 148 (Sao Matheos; Santos; Para; Curuca; Bahia; Per- 

 nambuco; Brit. Guiana). 



Galeichthys gronovii Cuv. & Val. Hist. Nat. Poiss. xv, 40, 1840 (Gui- 

 ana; Maracaibo; Maua; Cayenne; Bahia); Miiller & Troschel, 

 Schomburgk, Brit. Guiana, 628; Kner, SB. Ak. Wien, xxvi, 1857, 

 392 (Cajutuba, Para). 



jElurichthys gronovii Giinther, Cat. Fish. Brit. Mus. v, 178, 1864 

 (Demerara, West Indies). 



Felichthys filamentosus Swainson, Fish. Kept. & Amph. ii, 309, 

 1839 (based on Bloch pi. 365). 



Galeichthys eidouxii Cuv. & Val. Hist. Nat. Poiss. xv, 43, 1840 (Guay- 

 aquil). 



jfflilurichthys eydouxii Jordan, Proc. U. S. Nat Mus. 1884, 40 (note 

 on type) . 



Bagrus macronemus Ranzani, "Nov. Comm. Acad. Sci. Inst. Bo- 

 non, 1842, v, 334, plate 28." 



Mijstus carolinensis Gronow, "Syst. ed. Gray, 156, 1854." 



Pimelodus loncjifilis Mus. L. B. (fide Bleeker). 



Habitat: West Indies, south to Santos below Eio Janeiro. 



Compressed elongate; greatest width less than the 

 greatest depth. Head depressed, short, its greatest width 

 IY in its length, the depth at the occipital process li-lj 

 in the length of the head; the profile very steep. Oc- 

 cipital process much broader at base than at apex, which 

 is notched, articulating with the dorsal plate. Inter- 

 orbital flat, the fontanel not extending behind the eye, 

 continued as a groove to the base of the occipital pro- 

 3 



