Plate 17- 





PATTERNS WHICH PUZZLED DARWIN. 



The notch in the "eyes" of the Peacock's train-feathers puzzled' 



Darwin till he met with the ocelli of the Peacock-pheasant. The 



left-hand lower figure represents the ocellus of the Argus, the right-hand 



that of the Peacock-pheasant. 



[Face page 98. 



