66 THE APODID^ part 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. 



