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PLATE XII 
. 1. Corydoras zygatus Eigenmann and Allen, sp. nov. 
77 mm., creek, Yurimaguas. 
15704, type, 
. 2. Corydoras stenocephalus Eigenmann and Allen, sp. nov. 15817, 
type, 59 mm., Yarinacocha. 
. 3. Corydoras episcopi Higenmann and Allen, sp. nov. 
33 mm., R. Morona. 
_ 4. Corydoras leucomelas Eigenmann and Allen, sp. nov. 
39 mm., Yarinacocha. 
[4 
15605, type, 
15818, type, 
