C »37 ) 
means of thefe frequeni Gy rattens and win- 
dings of the htefiiHes, there is a greater Opportunity gi 
ven ro the Separation of the Chyle into the Fafa Chylife^ 
ra ; for the Bore of the lnte[line% being fo large (as I \mt 
fhewn) and there being no Valves m all their length ^ 
if there was not this Contrivance to give a Lett^ or Re^ 
mora to the hafty Delcent of the Fceces^ they would 
pafi off fo nimbly, that with them a great part of the 
Chymous Subftance likewife, would be carried off: But 
the Length of the Inteflmes here, being fo great ; and as 
they run, making fo many Convolutions^ they do prevent 
this Danger. 
Secondly^ By means of this Cochlea^ or Spiral Figure 
of the fir ft Mefenterie^ to which the fmatt Guts are affix- 
ed, there may be prevented a Regurgitation of the Con* 
tents of the Inteflines again into the Stomach, upon a 
Declivity of the Body of this Animal, as it is frequent- 
ly in, when it hangs by its Tail, For tho', as \ obfcr- 
ved, the Paffage from the Stomachy by the Pylorus^ into 
the DuoJenum, is large and open ; yet in this Pofture of 
the Body, there can't but be a Reduplication^ or folding 
over of the Duodenum; fince the great Bulk or Wallet 
of thefe Inteflines muft incline and (wag towards the 
Diaphragm ; by which Reduplication^ the Paffage at the 
Pylorus mufl:, in a great meafure, be occluded ; and the 
a/cent of the Contents now, be altogether as difficult 
and great, as when the Animal ftands upon its Four 
Feet. 
The Reverfe of this Strudure of the Inteflines I found 
and have defcribed in my Anatomy (cc) oiiht Tajacu^ 
or the Mexico Musk Hog:- for here the Colon made a 
Spiral ¥\g\xrQ (as I have there reprefented, in Tab. r. 
Fig, 5".) and the fmallGuts made a Plain. In our pojfum 
the fmall Guts makes a Spiral, and the Colon and great 
Guts a Plain, But a Spiral Convolution of the Intejiines 
X is 
