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as they bear upon the theory of innate ideas, or at least of innate 
genius. From the foregoing experiment the conclusion is very 
tempting, that the birds are endowed with special faculties and 
ideas, just as it appears that men are born with a special apti- 
tude for certain acts, both mental and physical, and that mind 
is endowed with properties of a special nature ; at least, they 
are of great interest because they are facts which ought not to 
happen, according to the theory which is daily becoming more 
fully received. They belong to one of those by-paths of Biology, 
which it is Mr. Wallace’s delight to tread, and in which he has 
done such excellent work. 
