ANNOTATED LIST OF THE SPECIES 311 
Peruvian Amazonia 
Known from the type, a Hauxwell specimen from the prolific Ambyiacu river, 
21 inches long; an additional specimen 118 mm. long from the Ucayali at Con- 
tamana, both in the Museum of the Philadelphia Academy. One of the species 
with an ornate tail fin, of the rubrotaeniatus group. 
431. PrRocHILODUS AMAZONENSIS Fowler 
Prochilodus amazonensis Fowler, 1906 (1907), Proc. Acad. Nat. Sci. Phila., LVIII, 316, fig. 15, 
lower Amazons; 
Fowler, 1939 (1940), Proc. Acad. Nat. Sci. Phila., XCI, 260. 
ean 
Fra. 34. Sunset in the Pongo de Manseriche. The Peruvian Amazon just below the water gap 
of the Andean foothills, where the great river bursts its last bonds and escapes to the alluvial plains. 
Upper and lower Amazons 
Represented in Peruvian waters by Fowler’s three specimens of the Morrow 
collection, 98-130 mm., from Boca Chica, Bajo Ucayali. Near P. insignis Schom- 
burgk, and, like theraponeura, differs in having a dorsal fin longer than the head. 
432. PROCHILODUS INSIGNIS Schomburgk 
Prochilodus insignis Schomburgk, 1841, Fish. Brit. Guiana, 261; 
Kner, 1859, Denksch. KIx. Akad. Wiss. Wien, XVII, 147; 
Giinther, 1864, Cat. Fish. Brit. Mus., V, 296; 
