THE MUSCULAR SYSTEM. 



251 



all the elevations and depressions of the surface (fig. 90). 

 Close to the bones, the tendons frequently contain, throughout 



Fig. 90. 



.--JO 







6' 





a certain extent, delicate, isolated cartilage cells, which are 

 sometimes, however, contiguous and disposed in small rows. In 

 exceptional cases, I have also seen the tendinous fibrils, at 

 their extremities next the bone, entirely incrusted with cal- 

 careous salts, in the form of granules (ossified). In fibrous 

 membranes, the tendons cease quite imperceptibly, and without 

 any interruption of continuity (tensor fascice, biceps humeri). 



[In man, I must positively deny that the tendinous fasciculi 

 are ever connected merely with the sarcolemma (Reichert). 

 Nor could I satisfy myself that this is the case in the River- 

 crab, in which, the tendons, it may be remarked, consist of 

 chitine. Whilst other animals have afforded indubitable evi- 



Fig. 99. Insertion of the tendo Achillis into the calcaneuru of a Man 60 years 

 old, x 300 (liain. A, bone with lacuna:, a; canalli and fat-cells, b : B, tendon with 

 tendinous fibrils and cartilage cells, c. 



