ve The 
ing through the liver, which is placed between 
them, but they are much lefs rolled and turned 
in this than in the larger Snail, fince they are 
ftretched according to the length of the body, 
and are not obliged to fellow the convolutions 
of a fthell. The liver is divided. into many 
lobes, and confifts only of minute glandules. 
The genital parts in this Snail are worthy of 
particular notice, fince they fill the whole belly: 
but I fhall treat of thefe hereafter, when I thall 
briefly defcribe the parts of the head, neck and 
breaft. The head prefents a tooth, vifible in 
the mouth like that of the larger Snail, and 
all the parts of the mouth are alfo formed in 
the fame manner as we have there related. 
‘The brain likewife, the fpiral marrow, and the 
nerves, which are placed in the neck, do not 
differ much, and are eafily difcovered. The 
mufcles which move the upper horns inward, 
are much more brown or blackifh than in the 
larger Snail; but the reft, and likewife thofe 
which pats through the thorax, have fome 
flefh, as well as their white tendons, and are 
both inferted in the fkin, which is very thick, 
and where the eminence lies: nor are there 
any bones in the Snail, in which the mufcles 
thould be inferted. A mufcle is therefore here 
inferted in a mufcle, and one dilates another, 
which is a very admirable thing to fee in 
animals. 
The organs of generation in this Snail, open 
by three diftinét apertures in the neck, Tab. 
VIII. fig. 1x. a2, which unite in one paflage on 
the outfide. The firft opening is peculiar to the 
penis 44, the fecond to the uterusccec, the 
third to the purple bag, which is very fhort 
in this Snail. The penis is ftrong and very 
nervous, and it lies ina little kind of a purfe, 
which may be diftended by the breath, that 
the penis may roll itfelf out from thence. On 
the hinder part or fide of the penis iffues a {mall 
filament e, which is connected with that of 
the uterus fff, This ligament of, the uterus 
abounds with many granules, which are white, 
and unequally divided ; thofe, at firft fight, I 
took for the ovary in the larger Snail, thinking 
that the little eggs were conveyed through cer- 
tain hidden channels out of it into the uterus: 
but I now obferve, that it has a peculiar kind 
of tube in this Snail, which opens into the hinder 
part of the cavity of the penis, and conveys its 
matter into it. The uterus wraps itfelf round 
this ligament, and is greatly {trengthened by 
its connexion therewith, though this connexion 
is formed in the beginning only by {mall in- 
tervening membranes. 
The uterus in the Snail which I diffected, 
was very much diftended and {wollen gg with 
little eggs; nay, its texture feemed more ftrong 
and firm, than when/nothing is found in it. 
On the hinder part lay the glue-bag bd, very 
much dilated and expanded into lobes, which 
were again ftudded in a peculiar manner. 
When I viewed them with a microfcope, I 
obferved, that they were all full of very {mall 
fpheroidal globules, whereof fome were bigger 
BOOK of NATURE: or, 
than others. The chain-like little part 22 was 
itretched ftraight, or upright enough. The ovary 
was fallendown2, and deprived of its eggs, fothat 
nothing was left init but the membranous inclo- 
fures. All the egos, in my opinion, had def- 
cended through the chain-like tube into the ute- 
rus, and were to be immediately there covered 
with moifture, by means of the faculus that 
fecretes that fluid: this I fhall explain more at 
large, when I {hall {peak of the field Snail. Nor 
did the eggs, notwithftanding, flu€tuate freely 
in the uterus, but they all lay firmly fixed on 
one fide, which makes me ftill doubt to ad- 
vance what I have faid of the ovary and eggs 
as true and certain. But I hope thefe things 
will hereafter be made plainer. I hall there- 
fore proceed to the field Snail, the anatomy of 
which will throw great light on this matter. 
Of the field or path-way Snail. 
The common Snail of the path ways and 
fields differs from the houfé Snail, chiefly in 
refpect of the ftruCture of its external skin, and 
in a peculiar kind of verge which furrounds 
its body ; to which may be added, the fiffure 
that is in the extremity of its tail, out of 
which a certain glutinous humour is fecreted : 
but there is no difference in the internal parts. 
I have delineated the field Snail, which I here 
exhibit, in the form it has when contracted, 
Thus its two largeit horns, ‘Tab. IX. fig. 1.2, 
may be feen, except a {mall part thereof, which 
is covered by the eminence or velabrum, On 
the right of this velabrum is feen an aperture 4, 
whereby the Snail draws the air and difcharges 
its excrements: the fame may be obferved like- 
wife in the houfe Snail. In the cavity of the 
eminence, the skin is alfo white and reticulated, 
as itis inthe houfe Snail. ‘The external tex- 
ture of this eminence confifts of fine glandu- 
lar granules, or little grains, which are far from 
being orbicular ; they are ftriated as it were, 
and rendered unequal by fome tubercles, though 
thefe ftrie or furrows are not as remarkable in 
this as in the houfe Snail. ‘The reft. of the 
body is furrowed as with pretty confiderable 
wrinkles ; hence it is that many glandular pro- 
tuberances appear in it, which are of a trian- 
gular form, and rife up obliquely, and are di- 
vided cc by many {mall glands. The body is, 
moreover, adorned with a full, or gloffy, red 
verge dd, which is beautifully divided and {ub- 
divided by black furrows, fome of which there- 
fore are more confpicuous than others. This 
Snail can extend itfelf to three times the length 
that I have here reprefented ; and then the di- 
vifions of the skin before defcribed acquire as 
it were another form, by the force of its ex- 
panfion. The whole body is of a deep brown, 
mixed with a ruddy colour; but thefe Snails 
differ very much with refpeé to their colour. 
As its internal parts are organized, and cir- 
cumftanced much in the fame manner as in the 
houfe Snail, I fhall now. briefly defcribe only 
the ftructure of the genital organs, and add the 
conftruction 
