146 Theil kBvOvVO Tei ior 
a globular prominence 4, from which a cryftalline 
lens partly projects z. 
T have thought proper togive a feparate draw- 
ing of the pupil’s covering. or lid, continued to 
the extremity of the choroide tunic; I firft re- 
prefent it on that fide where it was cut from the 
eye Fig. 111. &, and looks ofa deep green colour, 
which by degrees grows paler, and is interwoven 
with delicate veffels. I then exhibit its other fide, 
by which itmay be faid tofloat freely in the aqueous 
humour, and reft. againft, the cryftalline lens, 
In this part it is of a filvery. whitenefs, and inter- 
Aperfed with very delicate ftreaks or fibres. Thefe 
fibres look as if they were continued not only to 
the filaments of the iris, but likewife to thofe of the 
choroide tunic, which I have already reprefented. 
This covering or lid of the pupil is of an extreme 
blacknefs in that part of it, which lies over the 
fuperiér region of the cryftalline lens. 
I could find but very little of the aqueous 
humour on the infideof the eye, whereas that con- 
ftituting the cryftalline lens was in confiderable. 
quantity, and wastolerably compact. But there 
was fomething fingular in this laft part, namely, 
ats coat’s being of an extraordinary thicknefs, and 
likewife its ciliary ligaments penetrating fo deep 
into the cryftalline lens, that it in fome mea- 
fure as it were divided this part of Tab. LII. 
Fig, 1v. m, the eye; thismay be beft feen on the 
fore part. On boiling this eye, and then pealing 
off the ciliary ligament, along with the coat of 
the cryftalline lens; and likewife the fore fegment 
of this lens from its back fegment, the lens itfelf 
appears exactly like a globe contained in a femi- 
globe, or like a {phere in a hemifphere. 
The vitreous or glafiy humour was in a man- 
ner fo perfectly fluid, as rather to deferve the 
name of an aqueous than vitreous humour. I 
could not difcern exactly the retina, as the black 
juice of the avea happened to get out of its mem- 
brane, and thereby {pread an impenetrable ob- 
{curity all over the adjacent parts. This accident 
for want of fubjets, obliged me, to putan end 
to my anatomical furvey of the eye; and there- 
fore I fhall return to the brain, and the nerves 
that iffue from it. 
From the fore region of the brain, there arife 
three confiderable pairs of nerves, which, after 
making their way thro’ the cartilages of the 
brain, run in a moft beautiful manner to the 
mufcles of the head, beak, legs, and adjacent 
parts. But the conftruétion of the middle pair is 
more admirable than that of the lateral ones, as it 
{wells into a node or globule Fig. 11.7, from 
which the nervous branches iffue in,a moft ele- 
gant manner, like rays of light of the fun’s 
body. . 
The better to thew the fituation of all thefe 
parts, I have given a particular engraving of the 
cartilages which furround the brain 00, as well 
as thofe ferving for a foundation or prop to the 
eight legs, pf, in the center of which lie the 
mouth and the beak, From the back part of 
the brain iffue two very large nerves, gg, which 
form each of them a remarkable knot, 7 7, 
after having pafled through the thorax, and un- 
der the mufcles that ferve to move the acetabula 
> 
INGA RD AUR ov tork 
of the common excretory da. 
more than twenty litle nerves; which fprung 
from each ganglion, and were diftributed to 
the region of the gills, after running on each fide 
of the acetabula, of the common exeretory du, 
where they in part fhewed themfelves through 
the tranfparent fkin, Tab. LI. Fig. 1. 2, 
The genitals of the male Cuttle-Fith may be 
divided into three parts, one tefticle, and two 
glandulous parts, between which there lies ano- 
ther glandulous body, divided intoa great many 
lobules; and laftly, a peculiar glandulous and 
{pungy body, in thape like a heart, feated under 
the animal's ink bag. 
That part, which I call the tefticle, on ac- 
count of its external appearance, is fo admirably 
contrived, that it greatly turpaffes all the wonders 
I have hitherto related of the Cuttle-Fith. It 
-ends in a particular open-mouthed tube, which 
floats loofe in the body, like the end of the 
ftraight gut, #. It is through this tube the tef- 
ticle difcharges its {perm, fo that it may very pro- 
perly be called the vas deferens of this organ. J 
could fometimes obferve fome very tender and 
delicate white fibres hanging from this part, 
Tab. LIT. Fig. v. 2; but I cannot fay whether 
they were natural, or were occafioned by fome 
diforder in the animal, as I never examined 
them in a live one. This fingle tefticle is oval, 
but it ends at the bottom in a kind of a point, 
b. In the centre of it there is a little body, 
which very nearly anfwers the paraftate, or cor- 
pora variaformia of quadrupedes, and even of 
man, ¢; but I have not yet been able to difcover 
where this veffel begins or ends, The nearer 
this little body, juft taken notice of, approaches 
the tefticle, the broader it grows: this circum- 
{tance may be beft feen, by turning the tefticle 
upfide down, and then divefting it of the great 
number of membranes which cover it, e. Ihave 
fome reafon to think, that the whole tefticle 
may be unfolded, and wound into one long vef- 
fel, fomewhat flenderer at its beginning and at 
its end, than in the middle, and terminating in 
a curious curled little tube, d@. The texture of the 
genital parts already mentioned, is glandulous. 
In the narrow parts of the channel juft now 
fpoke of, there is found a white fpermatick 
matter, which, on wounding this part, iffues 
forth in form of coagulated milk; but the fub- 
ftance contained in the fomewhat wider parts, is 
tranfparent: the wideft parts of all are full of an 
infinite number of little delicate white parts, 
fomewhat crooked, which are altogether free and 
loofe at their hinder ends, Tab, LIE. Fig. vr. /; 
bat at their fore ends, they terminate each in a 
very delicate filament, g, by which they are in a 
manner linked to each other. Thefe delicate fine 
threads may be unwound, to double the length 
of the other parts to which they adhere; and on 
taking both the. threads and thefe parts into the 
open air, the former immediately harden’ like 
the threads drawn from filk Worms, and thine 
and glitter like a looking glafs, 
* The moft furprifing circumftance in this part 
is, that on throwing fome of thefe into water, they, 
after a little time, begin to move, and then open-. 
ing 
I could count | 
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