NATURAL HISTORY. 259 
genera are represented on the Congo, but they certainly 
do not show themselves in any abundance. About the 
mouth of the Congo, in the marshy forest country, 
monkeys seem to be much more common than up the 
river, to judge by the numbers brought for sale by the 
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natives. Here I have seen in captivity many mandrills 
(Papio maimon) and drills (P. leucopheus). At the Dutch 
House in Banana there is, or was at the time of my visit, 
an admirable collection of West African monkeys, in- 
cluding some very fine male and female mandrills. At 
Stanley Pool I have heard of baboons * being seen, and 
* Probably Papio Sphing. 
S 2 
