[ 2°3 ] 
and fpread from cell to cell, very uniformly, over a 
great part of the inteftine, although but little force 
had been ufed, and although there was nothing like 
extravafation in any other part of the intefline. Up- 
on inverting the inteftine after thus filling its ladleals, 
the mercury, on being prefled, was, in many parts, 
driven into fmall vefiels upon the internal coat, or 
villous, jas it is called. From this it would feem, 
that this’ cellular net-work was a part of the lympha- 
tic fyfiem in this animal. It might indeed be fup- 
pofed to be mere extravafation, but that it is rather a 
part of the lymphatic fyfiem appears probable from 
the following confiderations. Firfi, from the regu- 
larity in the fize of the cells. Secondly, from the 
little force ufed in the experiment, and from there 
being nothing like this appearance in the cellular 
membrane between the peritoneal and mufcular coats 
where extravafations were as likely to happen. 
Thirdly, from my having been able, after inverting 
the intefiine, to prefs the quickfilver from the cells 
into the very fmall vefifels upon the internal coat ; but 
I mufi confefs thefe fadls would not be fufficient to 
determine whether thefe cells were, or were not a part 
of the fyfiem, did not the analogy of the fame part in 
filh clearly prove it. For in the cod, infiead of the 
cellular net-work, as in the turtle, there is a net- 
work of vefiTels (of which a defeription (hall be given 
hereafter j fo that I have now no doubt but that thofe 
cells are parts of the lymphatic fyfiem, and that the 
fmall abforbent velTels of the internal coat pour their 
fluid into this net- work, from which it is conveyed by 
the larger la«fieals. 
D d 2 
XXIX. 
