FATTY DEGENERATIONS. 
195 
a, portion of a fasciculus of 
voluntary muscle of an Eel 
splitting up into discs, b c, 
fibrillse. d, fasciculus invested 
with its sarcolemma. e, masses 
of myoline detached from the 
fasciculus. 
FlG ‘ 147 - part forming the bead being 
a minute portion of muscular 
substance, termed myoline; but 
if the power be increased, the 
masses of myoline (c) will be 
found to be surrounded by a 
thin cell- wall. In the muscular 
substance of the Eel , the struc- 
tureless sarcolemma surround- 
ing a fasciculus (Fig. 147, b) 
is readily seen. In Fig. 148 
is represented a portion of the 
muscle of a Pig, prepared by 
Mr. Lealand ; on the lower edge of one of the fasciculi 
are distinctly seen the very delicate fibrillse a a , and, 
if the power with which this specimen is examined 
be sufficiently high, the central mass of myoline h may 
FIG> i 48 . be noticed in each little cell, 
The fibrillse vary in size in 
different portions of the same 
muscle, in the Skate and Shrimp 
I have seen specimens more 
minute than 6 ^th of an inch ; 
in these cases the particles of 
myoline can be discerned, but 
not the cell- wall around them. 
If the fasciculi have been kept 
long in spirit or acid, the fibrillse break up, and the masses 
of myoline are found either in short lengths or in detached 
o 2 
Fasciculus of voluntary 
muscle of a Pig : a a, fibril- 
lse ; b, enlarged representa- 
tion of one of the fibrillse. 
