Moreover, this apparatus is supposed to be a key-board in function as well as in appearance, the{54} vibration of each one fibre giving rise, it is believed, to the sensation of one particular tone, and combinations of such vibrations producing chords.

It is by the action of this complex organ then, that all the wonderful intricacy and beauty of Beethoven and Mozart come, most probably, to be perceived and appreciated.
Now it can hardly be contended that the preservation of any race of men in the struggle for life ever depended on such an extreme delicacy and refinement of the internal ear,--a perfection only exercised in the enjoyment and appreciation of the most perfect musical performances.

How, then, could either the minute incipient stages, or the final perfecting touches of this admirable structure, have been brought about by vague, aimless, and indefinite variations in all conceivable directions of an organ, suitable to enable the rudest savage to minister to his necessities, but no more?
Mr.Wallace[43] makes an analogous remark with regard to the organ of voice in man--the human larynx.

He says of singing: "The habits of savages give no indication of how this faculty could have been developed by Natural Selection, because it is never required or used by them.

The singing of savages is a more or less monotonous howling, and the females seldom sing at all.