( <9* ) 
oppofite part of the Tunicle. And in another Fibre 
cut tranfverfty, I faw Velfels ariling from the Cir- 
cumference, and dividing themfelves into fmaller 
Branches about the middle of the Fibre j all which, 
as far as I could perceive, ended again in the Cir- 
cumference of the Fibre. In one Fibre I faw at 
leaf! fifty of thefe Velfels running through one 
another. 
Upon this Difcovery, I found I had been mifta- 
hen in what I had at firft imagin’d, which was, that 
the Velfels, which arofe from the Membranes, pro- 
ceeded no farther, than juft through the Tunicle of 
the Fibre, and fo difcharged the Fluid into the 
Fibre for its Nourilhment. Whereas, now I per- 
ceiv’d, that the Velfels, which arofe from the Mem- 
brane, and entred into the Fibre, did not end there, 
but fpread themfelves into fmaller Branches proceed- 
ing every way from the infide to the Tunicle of the 
Fibre. This caus’d me to think, that the nutritious 
Juice might circulate in thefe fmali Velfels, juft as 
the Blood does in the Veins and Arteries } and that 
what the Mufcular Fibres received from them, might 
be no more than what ouzed thro’ the Tunicles of 
thefe fmali Velfels, as I have faid of the fmali Vef- 
fels in Land-Animals, which have no other end than 
the Artery coming from the Heart, and the Vein ter- 
minating in the Heart •, the Artery and Vein thus 
making one continued Velfel. 
Having now a great number of Fibres lying before 
me, in which I could fee very plainly the Velfels juft 
now treated of, yet I could not difcern in the tranf- 
verfe Se&ions of the Fibres any appearance of thofe 
Veffels, which run along their length, and coinpofe 
the greateft Part of the Body of each Fibre. This 
I imputed to the cutting of thofe Velfels not di- 
