276 BEACH GRASS 



best and sometimes elaborated or extended under 

 courtship excitement, are often continued and re- 

 peated for the mere enjoyment of the performer 

 in his own music. The autumnal recrudescence 

 of the amatory instinct, often displayed in song, 

 is well-known. 



The subject of bird song is one apart by itself, 

 and I have alluded to it in this brief manner 

 merely to round out the classification, made in the 

 beginning of this paper, of display; dance and 

 song — the important features of bird courtship. 



