[ = 4 ] 
of the fame figure with thofe from whence they 
have their Rife ; efpecially when fuch a Shape (as 
will appear in the Sequel) is more proper for all the 
Fiim&ions of a Mufcle than any other whatfoever J 
LHI. 
I don't mean by this, that every Fibre of every 
Mufcle is a perfect and regular Cylinder from one 
End to the other •, many of them may be thicker 
in their Coats, and larger in their Bores about the 
Middle than towards each End, limilar to the 
Shape of the Mufcle; but what I think the mod 
reafonable Opinion is, that the fmalleft Fibrilla are 
hollow Tubes not divided into an infinite Number 
of Cells or Veficles. 
LIV. 
The longitudinal, red, flelhy Fibres feem indeed 
to be contorted and bound about in many Places, 
with white, fpiral, and tranfverfe Ramifications of 
the Nerves; but I can fee no Reafon to believe 
that thefe nervous Filaments divide the longi- 
tudinal flelhy Fibres into feveral Apartments or 
Cells ; I rather think that they only dip into the 
Cavities of the Fibres, in order to convey into them 
the ethereal Medium , which is contained in the 
Nerves. 
LV. 
