CHAP. XX.] 
FISHES. 
445 
(6 genera), South America; Citharinina (1 genus), Tropical Africa ; 
Anostomatina (3 genera), South America ; Tetragonopterina (16 
genera), South America and Tropical Africa; Hydrocyonina 
(9 genera). Tropical America and Tropical Africa ; Distichodon- 
tina (1 genus), Tropical Africa ; Icthyborina (1 genus), Africa ; 
Crenuchina (1 genus), Equatorial America; Serrasalmonina (4 
genera), South America. 
The following is the distribution of the genera : — 
Macrodon (4 sp.), Tropical America; Erythriwm (5 sp.), 
Brazil and Guiana; Lebiasina (1 sp.), West Equatorial Ame- 
rica ; Pyrrhulina (1 sp.), Guiana ; Corynopomct (4 sp.), Trinidad 
only ; Curimatus (15 sp.), Tropical South America and Trini- 
dad ; ProchUodus (12 sp.), South America to the La Plata ; 
Ccentropus (2 sp.). East Equatorial America ; Hemiodus (8 sp.), 
Equatorial America east of Andes ; Saccodon (1 sp.), Ecuador ; 
Parodon (1 sp.), Brazil; Citharinus (2 sp.), Tropical Africa; 
Anostomus (8 sp.). Tropical America; Rhytiodus (2 sp.), Equa- 
torial America; Leporinus (14 sp.), South America East of 
Andes; Piabucina (2 sp.), Guiana; Alestes (4 sp.), Tropical 
Africa : Brachyalestes (5 sp.), Tropical Africa ; Tetragonopterus 
(32 sp.), Tropical America ; Scissor (1 sp.), South America ; Pseu- 
dochalceus (1 sp.), West Ecuador ; CMrodon (2 sp.), Chili ; Chcd- 
ceus (1 sp.), Guiana; Brycon (10 sp.), South America east of 
Andes; Ohalcinopsis (4 sp.), Central America and Ecuador; 
Bryconops (2 sp.), Tropical America ; Creagrutus{l sp.), Western 
Ecuador ; Chalcinus (4 sp.), Tropical South America ; Gastro- 
pelecus (8 sp.), Tropical South America ; Piabuca (2 sp.), Equa- 
torial America; Agoniates (1 sp.), Guiana; Anacyrtus (7 sp.), 
Central and South America; Systricodon (1 sp.), Equatorial 
America ; Salminus (3 sp.). South America ; Hydrocyon (3 sp.), 
Tropical Africa ; Sar codaces (1 sp.), West Africa ; Oligosarcus 
(1 sp.), Brazil; Xiphoramphus (7 sp.), South America east of 
Andes ; Xiphostoma (5 sp.), Equatorial America east of Andes ; 
Cynodon (3 sp.), Tropical America East of Andes ; Distichodus 
(7 sp.), Tropical Africa ; Icthyborus (3 sp.), Nile ; Crenuchus (1 
sp.), Guiana; Mylesinus (1 sp.), Equatorial America ; Serrasalmo 
(13 sp.), Tropical South America east of Andes ; Myletes (18 sp.), 
