Of Quadrupeds. 2 1 
only Lap, their Gulet not being Mufcular enough to carry 
up much at once. 
Thefeveral Parts of the Gulet, have their diftinct Ufes. 
The outer Membrane, is both a Fence, and a Swath to all 
the reft j efpecially to the Mufcular. For the Nervous un¬ 
derneath, being always capable of, and fometimes fubject 
to inordinate expanfions (as Dr. Willis doth well conjecture) 
it would Rack the Mufcular Membranes beyond their 
Tone, were they not bound up within this. 
The two Mufculars, chiefly fublerve the feveral Motions 
of the Gulet. Amongft which, Dr. Willis reckons Ofcitation 
or Yauning, and Expuition. Of the firft, (a) his words are M Phar- 
thefe 5 In Ofcitatione, Oefopbagi duflum ampliari, & quaji a Ranoa 
vento quodam inflari is? expandi fentimus. But who knows 
not, that the Windpipe, and not the Gulet , is the part con¬ 
cern’d in all kinds of Refpiration, whereof Ofcitation is one. 
Of the latter, his words are thefe 5 (b) GuU Tunica carnofa, (b) ibid. 
duplex quaji Mujculws cenferi debet • quorum alter , expuitio- 
ms opus perfidt. At that time forgeting, that no man ever 
fpat any thing out of his Stomach 5 no more than he can be 
faid to vomit or eructate out of his Mouth. The Doc toi¬ 
ls one, of whom I have learned much : and therefore I 
mention thefe Things, only becaufe they lie in my way : 
and that we may ftill remember, Nullius in Verba. 
The Actions of the Gulet are therefore principally thefe 
Three, Deglutition , Vomition, and Exudation. By one of the 
Mufcular Membranes, faith the forementioned DoCtor, 
fc. that which defeends, Deglutition is performed 5 by the 
afeendent, Vomition. His words (c) are thefe, Cum unius Fi-(c) ibid. 
hr arum or do dejcendens,Deglutitioni inferviat 5 alter afeendens, 
Vomitiorm opus perficit. But that he was herein miftaken, I 
conceive,appears from the ftruCture of the faid Membranes, 
neither of which, is afeendent or defeendent, more than the 
other 5 and from the manner of their Contexture, as is 
above defcrib’d. Befides, if it were fo, why Ihould there 
not be Afeendent and Defeendent Fibers or Mufcules, for 
the Natural, and the Inverted Motions alfo of the Guts ? 
I conceive therefore, That Deglutition and Vomition are 
made by the Cooperation of both the faid Membranes : 
only in the former, the Motion goes from the Throat 
downward, in the latter, from the Stomach upward. And 
fo 
