The fea 6 Th O Ri Yeoh N’S E Gat &: 
the preceding figure of the eye, the diffection 
of which was begun at the upper part : then, 
at the fame time, may be very beautifully feen 
alfo the inferior or internal furface of the cor- 
tical fubftance of the brain, fig. v. {'/ which 
partly covers thefe cortical fibres. ‘This cortical 
fubftance likewife feems to be here divided in 
the middle, which divifion is covered with a 
kind of thin membrane. ‘This little part and its 
divifions I have marked with the letters ga in 
the fixth figure, which exhibits the fection in 
_ the upper part. The marrow, fig. v. 7, ‘as hath 
been obferved, appears then very beautifully 
placed between the cortical fubftance of the 
brain; and at the fame time it may be feen how 
- it partly communicates and is connected with 
that cortical fubftance. But I fhall afterwards 
particularly delineate, to the glory of the great 
Creator, and defcribe the whole marrow with 
all its nerves. I fhall only obferve here, that the 
letter y, fig. 1. and v. exhibits the firft knot 
which the matrow forms out of the brain; 
but fo, that in one figure it.is placed above, 
in the other below. Fig. v. zz, are the pyra- 
midal fibres of the eye, deprived only of their 
cornea on each fide. wu Exprefs the thickeft 
part of the fibres, and the place where they 
are moft coloured. « Shews the internal coat 
of the eyes, before demonftrated under the 
letter z fig. 1. in whichthe pyramidal figures 
terminate. 
_ Here alfo about the lower verge of the head 
fome parts of the mouth are feen, together with 
the two horny prominentilittle parts, wherein the 
mufcles of the teeth or jaws are in part fixed, 
and alfo the mufcles belonging to the begin- 
ning of the cefophagus. But I pafs by all thefe 
things at prefent, nor fhall I attempt to de- 
{cribe the organs of hearing, or thofe of {mell- 
ing, as I have not been hitherto able to ob- 
ferve any veftiges of fuch; though I fhould 
{carce believe, that the all-powerful Creator, 
who hath given to the Bees the organs of fight 
fo wonderfully formed, fhould deny them 
organs for the other fenfes. But fo great is 
our weaknefs; that we are not able to compre- 
hend and underftand natural things. 
It is likewife very difficult and hard to find 
the organs now mentioned in fithes and many 
other animals, becaufe they have no external 
paflage or opening. Thus I have obferved in 
the Chameleon, that the aperture of the organ 
of hearing opens into the mouth; which is 
likewife the cafe in the Frog. And hence it 
neceflarily follows that the knowledge of the 
ftructure of one animal throws a light on, and 
fhews us the way to that of another. Indeed, 
comparative anatomy is a moft faithful and 
liberal miftrefs, fince the parts that are obfcure 
and hard to be feen in one animal, may be 
fornetimes very diftin@ly traced in another. 
Before I difmifs the eyes, I fhall firft briefly 
fubjoin here what I have feen and obferved 
about thofe of fome other infe@s.: 
‘The eyes we have been hitherto defcribing 
are formed in like manner in the working 
als 
Bee: there is however this differénce that in 
the latter they are vaftly fmaller, and there- 
fore have the fewer number of inward fibres. 
But to proceed in order, I fhall here obferve, 
that if the skull, together with the cornea of 
thefe three little eyes, be taken off the head at 
the fame time, then immediately between 
thefe eyes, and under the antennz or horns, 
are obferved two oblong pulmonary bladders, 
which I have not feen in the head of the 
male, and which probably make the working 
Bee light, and give it'a greater agility. There 
isa larger quantity of fat in the head of the 
working Bee than in that of the male. This 
fat being placed on a piece of very thin glafs, 
-and left fo until it is dried, becomes entirely 
pellucid, becaufe its tender connecting white 
membranes grow dry by this means, and hence 
alfo the pulmonary tubes diftributed through 
this fat now become confpicuous. ‘This tat 
adheres in a wonderful manner, linked as it 
were, and twifted under the skull ; the muf 
cular fibres of the jaws are alfo here more 
numerous than in the head of the male. 
But the brain, the tranfverfe cortical or gray 
fibres, and the cortical fubftance of the brain 
itfelf, are here conftituted in like manner as 
in the head of the male Bee, but they are 
clearer and more eafily examined ; for the in- 
verted pyramidal fibres fituated above are fewer 
in the working Bee, and do not all prevent 
the fubjacent parts being feen. 
The eyes of the Watp are conftructed 
nearly in the fame manner, and in their ex- 
ternal and internal form refemble the Turkith 
kidney-beans, being bent fomewhat inwardly 
towards the fides of the horns or antenne, 
.as if there was fome part cut off there. The 
internal fibres anfwer to the external divifions, 
as before obferved ; for as the pyramidal fibre 
is extended by every divifion, it neceflarily 
follows, that the internal figure of the eye is 
entirely like the external. 
In many {pecies of infects there is a confi- | 
derable and wonderful difference in refpect to 
the external figure of the eye. How the eye 
of the Rhinoceros Beetle is difpofed and 
fafhioned, is fhown by its figure. 
In the Bee of Goedaert, which is really a 
dunghill Fly, the eye is framed nearly in the 
fame manner as in the working Bee; for under 
the divifions of its cornea, there are likewife 
placed a great number of pyramidal inverted 
fibres, which being broken off with the cor- 
nea, avery beautiful red or fomewhat pur- 
plith matter prefents itfelf; but when the 
cornea is removed from the pyramidal fibres 
without hurting them, they appear yellowith. 
There are likewife innumerable pulmonary 
tubes in this eye, and a great quantity of fat. 
In the Libella, or Fly of Dr. Hooke, called 
by the Englith the Dragon-Fly, and in Dutch 
Puyftebyter and Rombout, the eye, in refpect 
to its external divifions and internal pyramidal 
fibres, differs confiderably from the eye ot the 
Bee ; for the upper divifions are much larger 
1p 
