THE MUSCULAR SYSTEM. 



23T 



mities next the bctae, entirely incrusted with calcareous salts, in the 

 form of granules (ossified). In fibrous membranes, the tendons cease 



Fig. 99. 



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 evidence of the existence of the same conditions as in man, 

 the Frog, in particular, presents evidence of this fact ; in the tadpole 

 of which, owing to the sparing development of pigment in the tail, the 

 transition of the extremities of the muscular fibres, which are frequently 

 divided into three and five serrations, into the same number of minute 

 tendons, may be very distinctly seen. In the caudal muscles, also, of 

 the Cod, I noticed, very distinctly, the continuous connection of the 

 tendons and muscles ; in this case, owing to the shortness of the muscles, 

 many muscular fibres were even seen in their entire length, together 

 with the tendinous fasciculi at each end.* 



FIG. 99. Insertion of the tendo JLchillis into the calcaneum of a Man sixty years old : #, 

 bone with lacunse, a; canalli and fat-cells, 6; J3, tendon with tendinous fibrils and cartilage 

 cells, c. Magnified 300 diameters. 



* [There can be no doubt that both the modes of connection between muscles and their 

 tendons, described above, exist. Is it not possible that the gradual transition or the sharp 



