SOUTH AMERICAN NEMATOGNATHI. 133 



in the head; the rays nearly of the same height. Distance 

 of the adipose fin from the dorsal \-\ the length of the 

 latter. Adipose fin 2-f-3 in the length. 



Caudal deeply cleft, the lower lobe wider and slightly 

 longer, little shorter than the head. 



Anal shorter than high; its free margin rounded; its 

 longest ray about half as long as the head. 



Ventral fins inserted under the vertical from, the 

 seventh or eighth dorsal ray, lg in the head. 



Pectoral spine slender, with strong recurved hooks on 

 its anterior margin near the tip, and much weaker teeth 

 along its posterior margin; its length 2 in head, longest 

 ray U. 



Color brownish with indistinct darker spots and mot- 

 tlings; caudal and anal dusky, the membrane of the 

 dorsal thickened at the base, a transparent bar above it, 

 the upper half of the membrane dotted with dark points. 



Head 4; depth 6-7. Caudal peduncle 10. Br. 7; D. 

 7-9; A. 12. 



, One specimen .21 in. and another .095 m. have 9 

 dorsal rays, one .107 m. has 7 dorsal rays, the rest .12 m. 

 ,085 m. and .07 in. have 8 dorsal rays each. Bon. Jar- 

 din on the Rio San Francisco; Porto Alegre, D. I, 7. 



Four specimens, locality unknown, have 7 dorsal rays 

 ach, one has 8. 



J92, Rhamdia wagneri. 



Pimelodus cinerascens Kner & Steindachner, Abh. Bay. Ak. x, 49 



(not of Giinther). 

 Pimelodus wagneri Giinther, Fishes Cent. Am. 393 and 474, 1866 



(Pacific and Atlantic rivers of Panama); Steindachuer, Fluss- 



fische Siidamerikas, i, 14, 1879 (Mamoni river near Chepo). 

 Rhamdia wagneri Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. i, 126, 



1888 (Gorgona; Kio Chagres; Kio Obispo; Turbo; Atlantic coast 



Central America). 

 Rhamdia bransfordii Gill, Proc. Acad. Nat. Sci. Philad. 1876, 337 



(Panama). 

 Habitat: Eastern and western slopes of Central America. 



