ïiv^ 



^^p 









^a:s 





Figure 11. Transverse section of developing striated muscle fibres from an embryo 

 of Zoarces vivipara, 28 mm. in length. Note how the bundles of fibrils are 

 gradually encroaching upon the achromatic myosyncytium, leaving clear zones 

 within which the sarcolemma is being developed in situ. The fibrils on the 

 periphery of each bundle develop first and are therefore larger than those 

 nearer the centre. X 1000. 



