EIGENMANN: THE FRESHWATER FISHES OF BRITISH GUIANA 



99 



Aspredinidae 



Siluridae: 



Pimelodinae 



Doradinee 



Auchenipterinae . . 



Ageneiosime 



Helogeneidae 



Pygidiidae: 



Cetopsinae 



Pygidiinae 



Calliehthyidse 



Loricariidae: 



Plecostominae . . . . 



Loricariinae 



Characidas: 



Curimatinae 



Prochilodinae 



Hemiodinae 



Chilodinae 



Nannostomatinse 



Anostomatinae . . . 



Leporinae 



Pyrrhulinirue . . . . 



Crenuchinae 



Iguanodectinae . . . 



Tetragonopterina? 



Bryconinae 



Chalcininae 



Brachycalcininae . . 



Gasteropelicinae . . 



Serrasalniinas . . . . 



Mylinae 



Characinae 



Acestrorhynchina? 



Erythrininae 



Gymnotidae: 



Eleetrophorinae . . 



Sternarchinae . . . . 



Hypopominae . . . . 



Gymnotinae 



Pceeiliidae 



Belonidae 



Sciscnidae 



Cichlidae 



Achiridse 



Species Below the 

 Kaieteur. 



Species Above the 

 Kaieteur. 



13 

 5 

 2 



1 



2 

 2 

 2 



4 

 2 



2 

 1 

 2 

 1 

 6 

 3 

 6 

 1 

 1 

 1 

 30 

 2 

 1 

 1 

 2 

 2 

 3 

 3 

 2 

 4 



1 



4 

 6 



1 

 2 

 1 

 1 

 13 

 2 



140 



1 



10 



4(5?) 

 

 

 



1 







1 



(2?) 







1(2?) 

 5(6?) 

 (1?) 

 

 1 

 1 



10(11?) J 

 2 



1 



5(6?) 



1 











1 



1 



2 



1 



4 

 





 3 



2(3?) 

 (1?) 

 1 

 

 

 7 

 







2(3?) 

 

 

 



1 







1 







3 







2 

 

 1 

 



1 







3 



1 



1 







9(11?) 



1 











(1?) 

 

 

 



2(4?) 





 



1(2?) 



1 



2 





 



3(4?) 

 



87(102?) 58(71?) 



36(44?) I 



1 

 

 

 



1 







1 



1 



2 

 





 

 

 

 

 

 

 1 

 1 

 

 5 

 

 

 

 

 

 

 

 

 3 





 



2 

 1 

 1 

 

 

 3 

 



23 



2. Whence did the fauna of the plateau come? 



A. Is it the nucleus of the original fauna of Guiana? Or 



B. Have the faunas on the plateau and the lowland developed from a 



common nucleus? Or 



C. Is it a relict of a more abundant modern fauna? Or 



D. Does it consist of recent immigrants? Or 



E. Is it a mixture? 



To assist in answering these questions I give the species of the plateau with 

 their distribution in the Potaro and also their general distribution in South America. 



