66 THE APOUID^: TART i 



most obvious; enough, however, to establish our point 

 that Apus may have been derived at least so far as 

 its musculature is concerned from such an Annelid 

 as we have described. We thus find that the 

 musculature confirms what we learnt from our study 

 of the outer organisation and of the appendages. 



