MUSCLES 217 



As illustrations of the moulding and pruning of perfected 

 muscles it may be remembered that, as Macalister says, " portions 

 of muscles may also become detached and degenerated so as to 

 act as ligaments," and " the adult muscular system of man bears 

 everywhere traces of earlier cleavings and subsequent fusions, 

 partial disappearances and local outgrowths." 1 This passage 

 recalls one in which Huxley says in watching certain phases of 

 development you can almost see the hidden artist at work, and 

 here the sculptor may be pictured in his chipping, trimming, 

 rejecting and finally shaping, some creation of his brain ; and from 

 a biological point of view a vision of the processes of use and disuse 

 may be obtained. Professor Keith also speaks often of the migra- 

 tions of muscular attachments in a way which agrees with the 

 passage quoted from Macalister. 



1 Op. cit., p. 73 



