118 OSTARIOPHYSI. 
part of the anterior arch. Dorsal I 7; filamentous ray extending to the adipose fin. Anal 19-21; 
longest ray as long as or a little longer than the base of the fin. Pectoral spine nearly as long as the 
head. Silvery, back bluish. 
Hab. Soutn America, Brazil. 
Here described from two specimens, 300 and 400 mm. in total length. 
6. Adlurichthys filamentosus. 
Silurus bagre (non Linn.), Bloch, Ausl. Fische, t. 365 (1798) *. 
Felichthys filamentosus, Swainson, Nat. Hist. Fish. ii. p. 805 (1839)*; Jord. & Everm. Bull. U.S. 
Nat. Mus. xlvii. 1896, p. 118°. 
Ailurichthys longispinis (part.), Giinth. Cat. Fish. v. p. 178 (1864) *. 
Distance from tip of snout to origin of dorsal 4 the length of the fish. Occipital process narrowed posteriorly, 
with slightly concave lateral edges. Maxillary barbel extending to ventral fin; vomerine and palatine 
teeth forming a narrow band which is interrupted in the middle; 7 gill-rakers on the lower part of the 
anterior arch. Dorsal I 7; filamentous ray extending to the caudal fin. Anal 24-26; longest ray a 
little shorter than the base of the fin. Pectoral spine nearly as long as the head. Silvery, back 
bluish. 
Hiab. Atlantic Coasts and Rivers of Central America: 
Gulf of Mexico*; Lake Nicaragua °. 
Here described from a specimen 220 mm. in total length. 
7. Mlurichthys pinnimaculatus. 
? Galeichthys eydouxii, Cuv. & Val. Hist. Nat. Poiss. xv. p. 43 (1840) °. 
Ablurichthys pinnimaculatus, Steind. Sitzungsb. Ak. Wien, Ixxii. 1876, p. 565, t. 8°. 
Felichthys pinnimaculatus, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 117°. 
Distance from tip of snout to origin of dorsal fin } to 2? the length of the fish. Occipital process narrowed 
posteriorly, with straight or concave lateral edges. Maxillary barbel extending to, or nearly to, the 
anal fin; teeth on the palate forming a continuous or subcontinuous band, the vomerine and palatine 
patches subequal; 2 gill-rakers and a few rudiments on the lower part of the anterior arch. Dorsal I 7: 
filamentous ray extending to adipose fin or even to the caudal, Anal 27-31; longest ray about 3 the 
length of base of the fin (more in the adult, less in the young). Pectoral spine § to 7 the length of head. 
Silvery, back bluish ; a blackish spot on the anterior part of the anal and sometimes one on the caudal 
and on each of the paired fins. 
Hab. Pacific Coast from Mexico to Ecuador: 
Altata2 and Mazatlan in Sinaloa (Jordan *); Cuvusta Rica?; Panama 
(Jordan? *); Guayaquil}. 
Here described from three specimens, 250 to 500 mm. in total length. 
8. Mlurichthys bagre. 
Silurus bagre, Linn. Syst. Nat. p. 505 (1766). 
Ailurichthys gronovii (Cuv. & Val.), Giinth. Cat. Fish. v. p. 178 (1864). 
Felichthys bagre, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 117. 
