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FISHES OF WESTERN SOUTH AMERICA 
Type: Hyphessobrycon ellisi Pearson 
Beni basin, Bolivia, and the Chanchomayo, central Peru 
“This genus is Bryconamericus with incomplete lateral line.” 
261. BRYCONACIDNUS ELLISI (Pearson) 
Hyphessobrycon ellisi Pearson, 1924 (1925), Ind. Univ. Studies, no. 64, 39. 
Bryconacidnus ellisi Myers, in Eigenmann and Myers, 1929, Mem. Mus. Comp. Zool., X LITT, v, 545. 
Rios Beni and Chanchomayo 
————, 2. 25 and 26 mm., Rio Chanchomayo, La Merced, Allen, June, 1920. 
The material on which this species is founded was collected from several locali- 
ties in the Beni by Dr. Pearson, on the Mulford Expedition, and two specimens 
were taken by Allen at La Merced. The absence of collections from intermediate 
points may be due to the lack of thorough exploration in the upper tributaries of 
the Madre de Dios, Alto Ucayali, and adjacent territory. 
Genus 100: CREAGRUTUS Ginther 
Creagrutus Giinther, 1864, Cat. Fish. Brit. Mus., V, 339; 
‘igenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 435; 
Kigenmann, 1912, Mem. Carnegie Mus., V, 347; 
EFigenmann, 1927, Mem. Mus. Comp. Zool., XLII, iv, 417. 
Type: Creagrutus miilleri Giinther 
Colombia to Guiana, Rio Tocantins, and Bolivia 
Small fishes similar to Astyanax and Bryconamericus, with mouth and anal fin 
unlike; mandibulars in a single series and the premaxillaries in three series; anal 
short, having not more than 14 rays; lateral line complete and caudal fin naked. 
262. CREAGRUTUS PERUANUS (Steindachner) 
Piabina peruana Steindachner, 1875, Sitzb. Kix. Akad. Wiss. Wien, LX-XIT, 46, Monterico. 
Creagrutus peruanus Steindachner, 1878, Sitzb. Kis. Akad. Wiss. Wien, LX XVII, 6; 
Steindachner, 1882 (1883), Denksch. KIx. Akad. Wiss. Wien, XLVI, 25, Rio Huambo; 
Eigenmann and Kigenmann, 1891, Proc. U.S. Nat. Mus., XIV, 56; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, HI, 435; 
Eigenmann, 1927, Mem. Mus. Comp. Zool., XLITI, iv, 420, pl. xxxv, figs. 4 and 5. 
Creagrutus nasutus Giinther, 1876, Ann. Mag. Nat. Hist., (4), XVII, 400. 
Atlantic streams of Peru 
16050, , Rio Urubamba, Eigenmann, 1918. 
- 2, 45 and 53 mm., Santa Ana, Heller. 
13759, 27, 45-85 mm., Rio Comberciato, Heller. 
—, 19, 57-93 mm., Rio Chanchomayo, La Merced, Allen, June, 1920. 
