The 
means of the emitted nerves and conneCing 
pulmonary pipes ; fo that the brain lies above 
on the gullet, and again the gullet and ftomach 
are placed upon the {pinal marrow ; which 
part having no bone, is thus defended by them. 
‘The brain then being fituated in the manner 
thus mentioned in the Coflus and in Silk- 
worms, emits underneath from its bafis two 
tender little nerves, which I reprefent, fig. 11. 
aa, as they appear when cut out of the Coffus. 
Thefe nerves, called recurrentes, are directly 
from thence carried 64 upwards towards the 
mouth, and being then very beautifully bent 
they run back cc, and uniting d a little -above 
the brain, form a knot there. Out of this 
knot there {prings another nerve e, which be- 
ing conveyed under the brain, and defcending 
along the gullet by degrees towards the lower 
parts, reaches to the beginning of the {tomach, 
and there, before it inferts its branches in the 
ftomach, making another knot lefs than the 
former, at laft terminates in numerous very 
{mall nerves g: but thefe I could not trace 
further in the prefent experiments; though I 
am confident I could do a great many more 
things in thefe matters by the help of fome 
peculiar methods of diffection, if I had not 
been then {tinted in time. 
As thefe nervi recurrentes are extremely re- 
markable and worthy of confideration, I have 
therefore reprefented. them feparately, and 
fomewhat beyond their natural fize.. In the 
next place I have added a very exact figure, 
wherein the brain, fig. 111. a, the fpinal mar- 
row 666, &c. the nervus recurrens, and the 
reft of the branching nerves are {hewn as they 
appear in Silk-worms. But there are two of 
thefe nerves very remarkable pp, which I 
would have the reader ferioufly and repeatedly 
confider : they are perforated ss in a wonder- 
ful manner by the vafia deferentia of the tefti- 
cles in the Silk-worm Butterfly rr. But whe- 
ther this conduces to pleafure in this {pecies of 
infects, or to any other ufe, I leave others to 
Cet IPE > cerry 
FA ST ORLY 
P; 
of AL N«S E Gul S. 
determine. JI have in the fame manner deli- 
neated with the others the genitals of the Silk- 
worm Butterfly, and expreffed them in the 
fame figure with thefe nerves. A fhort ex- 
planation of this, as well as of all the other 
figures, will be found at the end of this work. 
’ .I have found ouf an excellent and uncom- 
mon method of preferving all thefe parts of 
the brain and marrow, by the help of which 
I can form them into a body, and keep them 
in their natural colour and fize ; whereas other- 
wife they are utterly deftroyed by keeping, I 
fhall communicate it when I publith my pecu- 
liar anatomical obfervations.. I have, asa {peci- 
men of the ufe of this method, preferved in this 
manner a great many fuch minute parts, which 
though they cannot be inveftigated and examined 
without infinite induftry and tedious labour, 
in the creatures themfelves, yet when they are 
thus preferved, prefent themfelves more fami- 
liarly to view than in their natural bodies, 
I cannot in the courfe of this hiftory avoid 
relating, how much the Peacocks and Peahens 
are delighted with eating thefe. Worms; and 
hence I am inclined to believe what Mouffet 
alledges from Pliny and Hieronymus, that the 
ancients ufed to eat them as a very delicate 
kind of food in Pontus and Phrygia. But pro- 
bably this was the fpecies of Coffi, out of 
which the larger Beetles are produced. If any 
perfon would eat the Coffi of our country, they 
mutt be firft kept fafting until all their excre- 
ments are confumed. When I havea mind to 
keep the Worm itfelf for, future obfervations, 
I make a fmall incifion in the hinder part of 
its body, and having afterwards preffed out the 
entrails through the wound, I fill the cavity 
with injected wax. Another method is this : 
all the fat of the Coffus muft be firft confumed 
with oil of turpentine, and then it may be pre- 
ferved according to art. This different and 
much more uncommon method. of preferving, 
I fhall likewife explain in due time *. 
139 
IV; 
The manner wherein the Worm is changed : how its inward parts are transformed 
in their increafe and growth, and the wonderful metamorphofis of the Worm 
into a Nymph.  Alfo the method whereby the points of refpiration, or breathing 
holes, are tranfpofed : to which are added many uncommon observations. 
Ve the time of this Worm’s change 
approaches, which in the year 1673 
happened on the fixteenth of Auguft, in thofe 
I obferved the Cofli penetrate deeper into the 
ground, or into whatfoever fubftance they in- 
habit, and feek for places that are more firm 
or compact, wherein with the preflure of their 
hinder part, they form a very artificial oval 
cavity, Tab. XXVIII. fig. 1v. every where 
{mooth and polithed. They lie a little while 
* The Beetles are a genus of infects fcarce lefs numerous than the Butterflies. We owe the firft rational attempt towards arranging 
them, and difpofing them in method, to our countryman Dr. Martin Lifter: he divided them firft into the land and water kinds: the 
firft comprehend all thofe called by this author Scarabzi 3 the latter Hydrocanthari, or water Beetles. Thefe laft are of two kinds, ac- 
cording to their place of living, {ome delighting in freth, others in 
falt waters. There are vaft differences in their horns or antennz, 
. of which we thall fpeak prefently 5 but thefe do not fo happily diftinguifh them as the two great divifions of the Butterflies. 
immov-~ 
