THE STRUCTURE OF MUSCLE. 



91 



semi-fluid, but it hardens and becomes solid immediately 

 after death. 



Examined, with high magnifying powers, in this 



t-—, 



Fig. 19. — Antaeus flaviatilis.—A, a single muscular fibre ; transverse 

 diameter jijth of an inch; B, a portion of the same more highly 

 magnified ; C, a smaller portion still more highly magnified ; 

 D and E, the splitting up of a part of fibre into fibrillas ; F, the 

 connexion of a nervous with a muscular fibre which has been 

 treated with acetic acid, a,, darker, and i, clearer portions of the 

 fibrillse ; n, nucleus of sarcolemma ; nv, nerve fibre; s, sareolemma; 

 t, tendon ; 1 — 5, successive dark bands answering to the darker 

 ■ portions, a, of each fibrilla. 



