The “HISTORY of INS E GIT & 
bombatt title, uz Cafar, aut nibil, i.e. aman, 
or a moufe, difcovered my thoughts fo far as 
- to know, that I had only one experiment for 
this purpefe? Indeed, my anatomical prepa- 
rations, which he fo much admired, could and 
ought fufficiently to have taught him, that I 
have not advanced that thefis rathly, or with- 
out important experiments. I would therefore 
advife him to contain himfelf yet, and temper 
-his gall with water, until I have leifure, and a 
more convenient opportunity, to treat this fub- 
ject, and folve the feveral doubts which I have 
faid hitherto occurred to me. I ‘hall then 
‘fhew the experiments, and affign the reafons, 
which confirm me in this opinion. And thefe 
are the very words, wherein I propofed to the 
public the faid thefis, in my notes on the Pro- 
dromus of the famous Hornius. But he that 
is bent on revenge, has in view only the mon- 
ftrous images of his own thoughts. In the 
‘mean time, however, as I have there mentioned 
experiments and reafons, this rafh young man 
might have concluded from thence, that I was 
provided with more experiments, to demon- 
{trate this thefis, than that trifling one, which 
I really do not acknowledge to be mine, in the 
place above cited. Nay, I join with this good- 
natured Bartholinus, who, like a Butterfly, has 
yet fcarce crept out of his Chryfalis, that the 
- experiment, confidered by itfelf, contributes 
nothing to ftrengthen my thefis: fo that it 
therefore appears, that he would refute what 
he himfelf does not underftand, and perhaps 
- is not capable of underftanding. But I return 
to my hiftory, which I hope will be more ufe- 
ful than a controverfy of this nature. In treat- 
ing this fubject hereafter, I fhall only explain 
what is pertinent to the matter itfelf, leaving 
altercations to thofe who love them. 
Below the place where the little inteftine, 
before defcribed, is feen within the inteftine of 
the Worm, the {mall gut is again diftended, 
equal, fmooth, and moderately large; but then 
a kind of {mall tube, Tab. XLI. Fig. v1. 2, 
is inferted therein, which is divided into vef- 
fels, either vafa varicofa, or rather the ceca, 
or clofed guts. Thefe veffels, like fo many 
{mall inteftines, difcharge themfelves into the 
beginning of the great guts, where the latter 
are united with this dilatation of the fmall. 
. Thefe blind or clofed guts are of a wonderfully 
elegant conftruGtion, and two of them are 
found commonly filled with a whitith humour; 
which in the more adult Nymph, I obferve, is 
by degrees fent alfo to the great guts. 
This fubftance is fometimes beautifully di- 
vided, as it were, into knots; and is likewife 
inwardly feparated, mm, by a more limpid fub- 
ftance, which feems mixed among it, like 
whey ; that nothing can fcarce be exhibited 
to the eye more artificially and beautifully dif- 
pofed, or more confpicuous. The figure, I 
have given, exhibits only a {mall part of this 
elegance, and that is but rudely drawn or deli- 
heated; becaufe, to exprefs it accurately, there 
would be need of a much larger figure. Thefe 
_ Glofed veffels cannot, but with very great diffi- 
58 
culty, be feparated from the fat that is anhexed 
to them; and this difficulty is the greater, be- 
caufe that white fubftance is not found in every 
part of them. Hence it is, that they are very 
eafily broken. But this happens ftill eafier in 
the Worm, becaufe the blind veffels are more 
{trongly connected in it; fo that it requires 
more labour to difcover them there: They 
difperfe themfelves, #7, with various and won= 
derful windings and convolutions, through thé 
whole belly; for they are {een no more in the 
thorax of the Nymph, which is all filled up 
there with the mufcles of the legs; and other 
parts. We at length obferve, that the two 
fuperior or uppermoft of thefe inteftines unite; 
0; and one of them is likewife divided twice 
-on the infide, and twifted into admirable wind- 
ings, pp: this goes towards the great gut, into 
which it difcharges its contents. The other 
-lower pair, wherein the above mentioned divi- 
fion of the white fubftance is exprefled, m m, 
are likewife twifted into various windings, 9 9; 
and at length terminate r in the clofed tube. 
The fourth of thefe inteftines is circumftanced 
in the fame manner, ss; for after various con= 
volutions, it terminates at laft alfo in the blind 
annular duct, 7. 
The colon is alfo every where uneven, with 
many knotty dilatations, v. Thefe are produced 
by the white fubftance found in its cavity; 
whilft the little inteftine hath been contracting 
itfelf in thofe parts, where it contains a leis 
quantity of that fubftance. A little lower is 
feen a larger knot in this inteftine, filled with 
a black fubftance. And at length two more 
dilatations occur y y in it, which poflefs thofé 
places of the inteftine, which, by the help of 
the humours that flow into them, {well into 
very large bags. But as the little infe@, af- 
ter putting on the form of a Fly, fecretes and 
difcharges that colluvies of humours; hence 
thefe windings may be properly called the 
cloaca, or fewer. Laftly, one may fee the 
rectum, or ftraight gut; and underneath, in 
the tail, the podex, or orifice through which 
the inteftines difcharge themfelves, , in. the 
laft ring of the abdomen. I have alfo judged 
it proper to delineate this Ting, as it coheres 
with the anus, in order to reprefent more clear- 
ly all the things which I have mentioned. 
When the Nymph is older, I have fome= 
times found its ftomach filled with a green 
fluid: but when it approaches to the change 
of its fkin, in order to acquire in a fhort time 
the form of a Fly, its ftomach and inteftines 
are found fo confiderably contracted, and by 
degrees become fo much‘ fhorter, that one 
would affirm one had diffeCted another animal, 
unlefs one had obferved all thefe changes, ac- 
cording as they gently fueceed each other front 
the beginning. 
In the lower region of the belly the cecum 
and rectum, or blind and ftraight guts, are ex- 
panded at that time very wide ; and are found 
to be {wollen, glittering, and {mooth, on ac- 
count of the white moiftures or humours which 
are mixed with a chalky matter. Thefe hu- 
mours, 
