STRUCTURE OF ORGANIC MUSCULAR TISSUE. 



189 



The surfaces of the muscular fibres, as well as their borders, 

 are generally smooth ; the latter are, however, occasionally 



Fig. 31. 



Fig. 31. a, Muscular fibres treated with serum ; b, muscular fibres 

 from the muscular tissue of the intestine, isolated by means of nitric 

 acid ; c, dichotomously divided muscular fibres from a pleuritic mem- 

 brane. 



Q2 



