28 
on the other hand, the clear part occupies a considerable in- 
terval between the sarcous element and the membrane of 
Krause, the sarcomere being lengthened and narrowed. The 
sarcous element does not lie free in the middle of the sarco- 
mere, but is attached at either end to Krause's membrane by 
very fine liiies, which may represent fine septa, running 
through the clear substance : on the other hand, Krause's 
membrane appears to be attached laterally to a fine mem- 
brane, which limits the fibril externally/' Page 105 : — 
"Comparing the structure of the sarcomere with that of the 
protoplasm of an amoeboid cell, we find in both a framework 
(spongioplasm, substance of sarcous element), which tends to 
stain with haematoxylin and similar re-agents, which encloses 
in its meshes or pores a clear, probably semi-fluid, sub- 
stance (hyaloplasm, clear substance of sarcomere), which re- 
mains unstained by these re-agents. In both instances, also, 
the clear substance or hyaloplasm, when the tissue is sub- 
jected to stimulation, passes into the pores of the porous sub- 
tance, or spongioplasm (contraction), whilst in the absence of 
such stimulation it tends to pass out from the spongioplasm 
(formation of pseudopodia, resting condition of muscle). 
Thus, both the movements of cell-protoplasm and those of 
muscle seem brought about by similar means, although at first 
sight the structure of muscle is so dissimilar from that of 
protoplasm. We have already noticed that the movements of 
cilia are susceptible of a similar explanation." 
Krause^s Membrane 
— Fine Se-pta 
Mle^^enli ^^- """''" '^'"« 
H 
Krauses Membrane 
Figure 6. 
