Dec. 28, 1916. FisHes or PANAMA— MEEK AND HILDEBRAND. 305 
We have for comparison specimens from western Ecuador, which 
seem to be identical with the Panama specimens. 
Habitat: Both slopes of Panama, except in the Rio Tuyra Basin, 
and the western slope of Ecuador. 
48. Hoplias malabaricus (Bloch). 
Esox malabaricus Bloch, Naturgesch. der Ausland. Fische, Pt. 8, 1794, 
149, Pl. 392 (Tranquebar, locality wrongly given). 
Synodus malabaricus Bloch & Schneider, Syst. Ichth., 1801, 397. 
Synodus tareira Bloch & Schneider, Syst. Ichth., 1801, 398, Pl. 79. 
Macrodon tareira Cuvier & Valenciennes, Hist. Nat. Poiss., XIX, 1846, 
508 (Bahia; San Francisco; Amazon; Maracaibo). 
Erythrinus trahira Agassiz, Spix, Piscium Brasil., 1829, Pl. 18 (Bahia). 
Macrodon trahira Miller & Troschel, in Schomburgk, Reisen in Brit- 
isch-Guiana, Fische, ITI, 1848, 632. 
Erythrinus macrodon Agassiz, Spix, Piscium Brasil., 1829, 43, Pl. 18 
(Alma, Prov. Bahia; San Francisco). 
Erythrinus microcephalus Agassiz, Spix, Piscium Brasil., 1829, 44 (San 
Francisco). 
Erythrinus brasiliensis Agassiz, Spix, Piscium Brasil., 1829, 45, Pl. 20 
(Peruaguacu). 
Macrodon guavina Valenciennes, Humboldt Observ. Zool., II, 1833, 179, 
Pl. 48, fig. 1. 
Macrodon auritus Cuvier & Valenciennes, Hist. Nat. Poiss., XIX, 1846, 
519 (Montevideo). 
Macrodon teres Cuvier & Valenciennes, Hist. Nat. Poiss., XIX, 1846, 
521 (Lake Maracaibo). 
Macrodon patana Cuvier & Valenciennes, Hist. Nat. Poiss., XIX, 1846, 
522 (Cayenne). 
Macrodon aimara Cuvier & Valenciennes, Hist. Nat. Poiss., XIX, 1846, 
523, pl. 586 (Cayenne). 
Macrodon ferox Gill, Ann. Lyc. Nat. Hist. N. Y., VI, 1858, 51 (Trinidad, 
W. I). 
Macrodon intermedius Ginther, Cat. Fish. Brit. Mus., V, 1864, 282 
(Cipo River). 
Macrodon malabaricus Eigenmann & Eigenmann, Cal. Ac. Sci., 2nd 
Ser., 2, 1889, 102. 
Hoplias malabaricus Gill, Proc. U. S. Nat. Mus., XXVI, 1903, rors. 
Head 2.15 to 3.3; depth 4.3 to 5; D. 13 or 14; A. 10 or 11; scales in 
lateral line 39 to 41. 
Body elongate, not much compressed, dorsal region not elevated; 
head long and low, slightly convex above; interorbital space 3.65 to 
