256 ELEMENTARY BIOLOGY. [CHAP. 



branched fibres, running in bold curves, will be 

 seen: these are yellow elastic fibres, as the 

 acetic acid (a. {3) destroys the white fibrous 

 tissue. 



e. Striped muscle. 



a. Tease out gently a bit of muscle which has been 

 kept in alcohol, and examine with i inch obj. 



a. Composed of elongated fibres, which exhibit 

 a tendency to split up into finer filaments 



b. Examine with high power. 



a. The alternate lighter and darker bands placed 

 transversely to the long axis of the fibre 

 (transverse striatiori). 



/?. The fine structureless membrane (sarcolemma] 

 enveloping the fibre : seen here and there as 

 a delicate film where the fibre is twisted or 

 bruised. 



y. The tendency to split up into fibrillae. 



c. Tease out a bit of fresh muscle in 075 J so die 

 chloride solution. 



a. The transverse striation of the fibres: less 

 distinct than in the' muscle from alcohol. 



ft. The absence of a tendency to split up into 

 fibrilhe. 



y. The sarcolemma, which may be seen at 



points where the continuity of its contents 



has been interrupted by pressure, twisting, 

 &c. 



