Vill A Short Explanation 
g The aperture of the uterus of the firft Snail, 
which in like manner admits the penis of 
the other Snail A. 
i Arab Vale 
The brain and nerves. 
a All the parts of mouth, jaws and palate. 
6 The gullet cut off. cc The brain. 
dd The beginning of the fpinal marrow, divi- 
_ ded into two {trong nerves. — 
e The knot or {welling formed by the nerves. 
f The mufcle by which the knot, or fwelling 
of the {pinal marrow is inwardly moved. 
g The two parts of the mufcles, which belong 
to the inward lips of the mouth, which are 
inferted by fome tendons in the knot or {wel- 
ling of the {pinal marrow, and which, toge- 
ther with the nerves, the mufcles draw with- 
in the body. 
bb A pair of nerves which are feen an the 
mouth, jaws and palate. 
77 A pair of optic nerves. 
kk A pair of nerves which reach to the roots 
of the horns and to the fkin. ; 
11. The nerves of the lower horns which arife 
from the former pair. 
mm Two tender nerves, which reach to the 
mufcles of the {kin and head, cut off. 
nn A pair of nerves fituated under the parts of 
the mouth. 
oo Other pairs of nerves which are difpatched 
to the mufcles of the neck. 
p A nerve which reaches to the {permatic vef- 
fels, to which alfo a fmall part of the penis 
adheres. 
g The nerves which are diftributed thro’ the 
membranes of the neck. 
rr The nerves which are difpatched to the 
mufcles at the fides of the body. 
s A nerve and mufcle which reach: to the 
uterus. 
# A nerve of the verge ftretched inward to the 
right fide. 
vy A like nerve on the left fide. 
x The nerves fixed in the tendons of the two 
ftrong mufcles, which move the middle of 
the body. See fig. 11. 2m of this Table. 
y The nerves which reach to the verge of 
the foot of the body. 
z Some of thefe nerves cut off from the right 
fide are omitted, to avoid confufion. 
Peal Geo Ik 
The mufcles of the Snail. 
a The part of the ftony bone or fhell of the 
Snail, where the mutfcles are inferted. 
6b The infertion of the two ftrongeft mufcles 
of the Snail, by the affiftance of which it ~ 
creeps and moves. 
¢ The part where thefe mutcles ftretch the tail 
itfelf backward or inward, and which pafs 
under the pillar of the fhell. 
bethe TA Baye Ss. 
d. The part where the mufcles of the verge are 
inferted. 
e The mufcles which draw in all the parts o 
the mouth, jaws and palate. 
jf The acute’extremity of the tongue. 
& The bafis or root of the tongue. 
bb The mutcles of the eyes. 
27 The curled foldings of the nerves among 
thofe mufcles. 
kk A part left of the firft 
_adhering to the mufcles. 7 
/1 A pair of mufcles which draw the lips and 
the knot or {welling of the {pinal marrow 
inward. ‘ae 
mm The mufcles of the lower horns, which 
arife from the former pair. 
nan ‘Two ftrong mufcles which draw the middle 
of the body into the hell. 
o The part where they are inferted. 
pp The internal furface of the fhell, in which 
its {piral windings, cells, and circumvolutions 
ape teen. tie 
99994 The fringe or border, or foot of the 
Snail. 
r The cavity of the pillar. 
FIG. 
pair of horns, ftill 
Ill. 
The convolutions, or windings of the fhell. 
a The outward opening of the fhell at which 
the Snail creeps out, and the winding which 
forms the firft cell or inward divition. 
6 The fecond divifion. c The third. 
d The fourth. e The fifth and laft. 
By 1 GuayckW | 
The internal part of the fhell broke open. 
12345 Are feen the inward windings of 
the fhell, when all the partitions are broke 
open. 
Pah.G. sv 
The Pillar. 
a The upper aperture and windings of the 
illar. 
6 The lower aperture of the pillar, which may 
be feen more plainly in fig. 11. 7. 
Feces) vib 
The Pillar. 
c The aperture, the fpiral windings, and the 
conftruction of the pillar diftinétly repre- 
fented. 
BT Go Vib 
Shews in what manner the greater or lefs divifions 
of the fhell may be formed, as tt is broken off 
Srom the pillar and its partitions. 7 
d A part of the fhell broken off, almoft to the 
end of its fpiral winding. 
e f Two others, lefs broken 
Pas ; ek CU AWN c ree 8 BB 
