CHAP. XX.] FISHES. 445 



(6 genera) ,|South America; Citharinina (1 genus), Tropical Africa ; 

 Anostomatina (3 genera), South America; Tetragonopterina (IG 

 genera), South America and Tropical Africa; Hydrocyonimi 

 (9 genera), Tropical America and Tropical Africa ; Distichodon- 

 tina (1 genus). Tropical Africa ; Icthyboriua (1 genus), Africa ; 

 Crenuchina (1 genus), Equatorial America; Serrasalmonina (4 

 genera). South America. 



The following is the distribution of the genera : — 

 Macrodoii (4 sp.), Tropical America ; Erytlirinns (5 sp.), 

 Brazil and Guiana ; Lebiasina (1 sp.), West Equatorial Ame- 

 rica ; Pyrrhulina (1 sp.), Guiana ; Corynoiioma (4 sp.), Trinichid 

 only ; Curimatas (15 sp.), Tropical South America and Trini- 

 dad ; Prochilodus (12 sp.). South America to the La Plata ; 

 Ccviitropus (2 sp.), East Equatorial America; Hcmiodun (8 sp.), 

 Equatorial America east of Andes ; Saccodoii (1 sjd.), Ecuador ; 

 Farodon (1 sp.), Brazil ; Cithai'inus (2 sp.). Tropical Africa ; 

 Anostomus (8 sp.), Tropical America; Bhytiodvs (2 sp.), Equa- 

 torial America; Lcporinus (14 sp.). South America Ea«t of 

 Andes ; Piabucina (2 sp.), Guiana ; Aksics (4 sp.). Tropical 

 Africa : Brachycdestes (5 sp.), Tropical Africa ; Tdragonoptcrus 

 (32 sp.), Tropical America ; Scissor {Is^.), South America ; Pscu- 

 dochalceus (1 sp.), West Ecuador ; Cldrodon (2 sp.). Chili ; Chal- 

 ceus (1 sp.), Guiana; Prycmi (10 sp.). South America east of 

 Andes ; Chalcinojms (4 sp.). Central America and Ecuador ; 

 PrycoiiojJs (2 sp.). Tropical America ; Crcagrutus (1 sp.). Western 

 Ecuador ; Chalcinus (4 sp.), Tropical South America ; Gastro- 

 IkIccus (8 sp.), Tropical South America ; Piahuca (2 sp.). Equa- 

 torial America; Agoniates (1 sp.), Guiana; Anacyrtas (7 sp.). 

 Central and South America ; Hystricodon (1 sp.), Equatorial 

 America ; Salminus (3 sp.). South America ; Hydrocyon (3 sp.). 

 Tropical Africa ; Sarcodaces (1 sp.). West Africa ; Oligosarcus 

 (1 sp.), Brazil ; XipJioramphus (7 sp.). South America east of 

 Andes ; Xlpliostoma (5 sp.), Equatorial America east of Andes ; 

 Cynodon (3 sp.). Tropical America East of Andes ; Distichodus 

 (7 sp.). Tropical Africa ; Icthyhorus (3 sp.), Nile ; Crenuchus (1 

 sp.), Guiana; Myhsinus (1 sp.). Equatorial America ; Serrasalmo 

 (13 sp.). Tropical South America east of Andes ; Mylctes (18 sp.), 



