TRAVELS ON THE RIO NEGRO. 
272 
\May. 
alone would be found to amount to five or six hun- 
dred. But the Amazon has most of its fishes peculiar 
to itself, and so have all its numerous tributaries, espe- 
cially in their upper waters ; so that the number of dis- 
tinct kinds inhabiting the whole basin of the Amazon 
must be immense. 
