The 
feparating from the enclofed kidney-bean-like 
fubftance; by which means this came at laft 
to lie in the tubercle as within a hollow, and 
to reft againft one fide or another of this hol- 
low. In this manner I plainly difcovered, that 
the three detached fubftances, in the tubercle 
I firft opened, had obtained, by evaporation, 
that wonderfully elegant fituation in which I 
found them. ‘This difcovery was afterwards 
confirmed by all the other tubercles, and their 
internal fubftances. On my firft obferving 
thefe furprifing changes, without knowing the 
ends which Nature intended to an{fwer by them, 
I looked upon’ the whole as a moft inexplicable 
riddle; as did likewife the ingenious perfons 
‘then in my company: for our walk was made 
merely with a view of regaling ourfelves, toge- 
ther with a contemplation of the ftupenduous 
miracles of the Univerfal Parent. 
We find in nature many other things, which 
agree and correfpond with what I have been 
juft now relating. The feeds of apples and 
pears, buried within the fleth of their refpec- 
tive fruits, fall off, little by little, from their 
coats and cups. The fame thing is obfervable 
in the kernels of filberts when they grow dry, 
and even in the nut itfelf or filbert, which at 
laft drops from its cup. But what is altogether 
fincular and uncommon, in the tubercle now 
under confideration, is, that this fubftance, 
which feparates from it, and lies loofe within 
its body, fhould contain a living Worm. 
When thefe fubftances, in confequence of 
the hollow occafioned in the tubercle by a 
large evaporation, have newly become loofed 
from it, their circumference is fomewhat rough 
and uneven; but as it dries, it grows even and 
_{mooth to the naked eyes: but the microfcope 
always difcovers on the furface the remains of 
the former ruggednefs, Tab. XLV. Fig. xv. g. 
In the fame manner the fpot, at which this 
fubftance received its nourifhment, never en- 
tirely difappears ; but remains difcernible to 
the laft, in the form of a little cicatrix or 
{car, b. 
The fubftance of thefe internal nodules is 
at firft foft and tender; but it afterwards 
hardens and dries up, and affumes a brownith 
red colour, which it never afterwards lofes; fo 
that, when viewed within the hollow of its 
green tubercle, it affords a moft pleafing {pec- 
tacle. When thoroughly dried, it is of a 
pretty compact and firm texture; and in re- 
{pect to its coat or cruft, it greatly refembles 
the rind of a chefnut, only this laft is much 
thicker. But neither thefe fubftances, nor 
the Worms they contain, are all of the fame 
fize. 
Likewife the number of thefe contained 
within the tubercles, varies greatly. In fingle 
tubercles, every one lies by itfelf in its own 
particular hollow; but it is the reverfe in the 
double or more compofed tubercles. Some- 
times alfo, though three or four tubercles grow 
in one, all their inner fubftances have notwith- 
ftanding each its own little cell, feparated bya 
Hy 1ST O RY *-of) I2N, 8. E: CO. 7S. 63 
kind of diaphragm or divifion. The {pots on 
which thefe fubftances grow within the tuber- 
cles, is generally a little moift or damp, which 
keeps them from rolling about. The cavities 
alfo of the tubercles differ in fize, which I at- 
tribute to the tubercles themfelves having been 
fome bigger than others, or to their having 
been dried up in different degrees. But, in 
general, there is found only one detached fub- 
{tance in every tubercle. a 
On opening one of thefe fubftances, that I 
had taken out of its tubercle, I found in it a 
living Worm, compofed of many rings, as I 
have reprefented it, larger than nature, on the 
middle of the Oak-leaf, Tab. XLV. Fig. x11. 
m. ‘The figure of this Worm was oblong, 
and its colour white. On its back appeared a 
gray ftreak, approaching to black; which I 
afterwards, on diflecting the Worm, found to 
be no other than one of its inteftines, which 
appeared through its tranfparent fkin, and 
owed its colour to the half-digefted food 
which it contained. In other Worms this 
ftreak was fometimes brown, fometimes red, 
yellow, or green, owing to the caufe already 
affigned. This little Worm lay in its bean- 
like fubftance in the form of a crefcent, quite 
free and loofe on every fide. I could not even 
difcover in it any umbilical veffels, or other 
connecting filaments, by which, according to 
the vulgar opinion, it might have drawn in 
its food. It moved and turned itfelf about at 
pleafure in this little habitation, being very 
vigorous and lively. There appeared no ex- 
crements in the cell, nor yet the leatt open- 
ing by which it could empty them. ‘The 
hollows of the tubercles were equally free 
from any foulnefs of that kind: every place 
was perfectly neat and clean. 
Neverthelefs I fhall not deny that this little 
infect received nourifhment within its co- 
vering, fince the contrary is plainly feen 
from the altered food which appeared in its 
inteftines, in the form of excrements, Hence 
I conclude, as a certainty, that this Worm 
fubfifted on the juices of the Oak-leaf, which 
were conveyed into the cavity of the fubftance 
by its ftalk, and that it took in thefe juices 
with its mouth. As this aliment, no doubt, 
is of the moft refined kind, there is the lefs 
reafon to wonder at the Worm’s not voiding 
any excrements, in confequence of its ufing {fo 
fine a nourifhment. On the contrary, retain- 
ing within its body the little that was fecreted, 
til an Opportunity offered of difcharging it 
all together, when it thould be turned to a 
Fly in due courfe of time, and freed from its 
confinement. It is common with feveral in- 
fects, produced from Nymphs and Chry‘fal- 
lides, to evacuate their excrements very copi- 
oufly, within the firft quarter of an hour after 
their appearing in the Fly-ftate. Noor is there 
any reafon to wonder at a creature’s being able 
to grow without difcharging any excrements, 
fince new-born Lambs and Calves furnith us 
daily inftances of this kind. Thefe animals 
Aa never 
