PLATE 2 



EXPLANATION OF FIGURES 



3 Very long tendon fibers which show a rather loose arrangement. The 

 tendon fibers branch at their inner ends, the fine branches surrounding the ends 

 of the muscle fibrils. Large nucleus of the hypodermal syncytium back of the 

 tendon fibers. This figure also shows that the horizontal layer of fibers may be 

 absent at the point of attachment of the muscle to its tendon. 



4 A clear demonstration of the fact that the basal layer of horizontal 

 fibers is composed largely of fibers derived from the hypodermal syncytium. In 

 this case the basal layer can hardly be interpreted as a true basement membrane 

 or as a connective tissue intermediate membrane. Horizontal fibers are seen 

 both above and below the nuclei. Those above eventually join the lower layer 

 which occupies most of the cell-territory between the nuclei and the inner border 

 of the epiderm. 



5 Striated muscle and its tendon. This section is especially favorable 

 because the tendon fibers show a very loose arrangement which provides for a 

 clear demonstration of their relation to the muscle fibrils. The network of fibers 

 at the base of the tendon is formed by anastomosing branches of the tendon fibers. 

 Tendon fibrils and fibrils derived from the network penetrate the muscle between 

 the ends of the muscle fibrils. This arrangement shows that the muscles are 

 'spliced' or 'dove-tailed : into their tendons, and that there is no direct continuity 

 between the tendon and muscle fibrils. 



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