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the fea:kinds copulate in a different manner from 
thofe of the garden: the one impregnates the 
other; but, from the pofition of the parts, is in- 
capable ot being impregnated by the fame in it's 
turn. For this reafon, it is neceflary for a third to 
be admitted as a partner in this operation; fo that, 
while one impregnates that before it, another per- 
forms the fame office by this, which is itfelf im- 
pregnated by a fourth. After this manner, Mr. 
Adanfon has obferved vaft numbers of Sea- 
Snails, united together in a chain, impregnating 
each other. The bulin and coret perform the of- 
iices of male and female at the fame time : the ori- 
fices in thefe two both feparate from each other; 
the opening by which the animal performs the 
office of the male being at the origin of the horns; 
that by which it is paffive, as the female, being 
farther down at the neck. It may alfo be ob- 
ferved as a general rule, that all animals with this 
orifice, or verge, as fome call it, on the right fide, 
have their Ihells turned from the right to the left ; 
on the contrary, thofe which have it on the left 
fide, have their fiiells turned from left to right, in 
a contrary dircdlion to the former. 
But this is not the only difference between I^nd 
and Sea-Snails. Many of the latter entirely want 
horns; and none of them have more than two. 
Indeed, if the horns of Snails be furnifhed with 
cyes; and if, as fome are inclined to believe, the 
length of the horn, like the tube of a telefcope, 
affiftsvifion; thefe animals, which chiefly refide 
in the gloomy bottom of the deep, can have no 
great occafion for them. Eyes would be ufelefs 
to creatures whofe food is ufually concealed in the 
darkeft fituations; and who, being poffefled of 
very little motion, are obliged to grope about for 
the articles neceffary to their fubfiftence. 
Sea-Snails are much larger than land ones. 
The lea indeed feems to poffefs a property of en- 
larging the magnitude of all it's inhabitants; and 
the fame proportion that a trout bears to a fhark, 
is often feen to obtain between a fhell bred on the 
land and one produced in the ocean. 
Unnseus divides Snails into three kinds, viz. 
the Earth, the Marlh, and the Sea-Snails. There 
are eleven fpecies of the Earth-Snails ; fixteen of 
the Marih, or Frefh-water Snails; and fix of the 
Sea-Snails ; according to this great naturaiift's 
diflribution. 
Pennant enumerates the following fpecies as 
natives of the Britifh ifles : the rock, the grey, 
the flat, the whirl, the dwarf, the horny, the mot- 
tled, the exotic, the garden, the fhrub, the varie- 
gated, the viviparous, the zoned, the pellucid, the 
cight-fpired, the lake, the mud, the ear, the 
fmoothed, and the olive Snail. 
Snail, Naked. There are feveral varieties of 
this kind ; of which the fubfequent are the moft 
remarkable. 
Snail, Black. This creature is fomewhat of 
a fubcylindric fhape, perforated on the fide. It 
has four feelers, on two of which it's eyes are 
fituated. The length is about three inches; the 
diameter is half an inch; and the head and tail 
are fmaller than the middle. The back is con- 
vex; the belly is flat; and the whole body is furr 
rowed and wrinkled very confidersbly. The 
whole upper part is entirely black; but the belly 
is grcyifh. The feelers are protruded or pulled 
in at the pleafure of the animal ; and the body is 
covered with a fort of flime refembiing that of 
the eel. It is of both fexes ; and poffefles the fa- 
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culty of impregnating and being impregnated at 
the lame time. 
This fpecies is extremely common in woods,, 
under hedges; and almoft in every damp fitua- 
tion, particularly in moift weather. 
Snail, Reddish. This animal is about two 
inches long, and fmaller in proportion than the 
black Snail. The body is covered with a great 
number of furrows or wrinkles; and the whole 
upper part is of a dufky red hue, except the belly, 
which is grey. 
Snail, Spotted, Yellow. This variety, 
when full grown, is about one inch and a half 
long; the back is prominent; the body is fome- 
what hollowed; and the head is fmall. The en- 
tire furface is flightly furrowed or wrinkled, and 
covered with a flimy juice; and the colour is a 
glofly yellow, with a brownifh caft, variegated 
with greyifh fpots. It is feldom feen in this 
ifland ; and has never been difcovered in the Ibuth- 
ern parts of England. 
Befjdes the above, we meet with the large grey 
Snail, fpotted with dufky brown ; the little fnort, 
grey Snail, without duflcy fpots ; the reddifh brown 
Snail ; the fmall duflcy brown furrowed Snail ; 
and the deep chocolate-coloured Snail. All thefe 
are naked, ordefl:itute of ftiells. 
SNAKE. In the Linnaean fyftem, a genus of 
ferpents, having abdominal and fubcaudal fcales. 
Here it mufl: be obferved, that Linnseus has di^ 
fl:inguiflied the fmall. fcales with which the back 
and fides of the animals belonging to the clafi of 
ferpents are covered, by the appellation of fquamje.; 
and the oblong, narrow, tranfverfe plates, with 
which the bellies of fome of them are covered, by 
the name of fcuta : thofe which are furnifhed both 
with fquamse and fcuta, he difl:ributes under the 
genus of coluber; thofe that have only fquamjc, 
under the denomination of anguis. In conformi- 
ty to this diftin(9:ion, he has ranked tiie common 
Snake, as well as the viper, under the genus of 
coluber; and clafled fixteen different fpecies, of 
which the common flow-worm is one, under that 
of anguis. 
Snake, Annulated. See Amphisboena. 
Snake, Common, or Ringed ; the Coluber 
Natrix of Linnaeus. This is the largefl: of Eng- 
lifh ferpents, fometimes exceeding four feet in 
length. The neck is flender ; the middle of the 
body is thickefl:; the back and fides are covered 
with fmall fcales; and the belly with oblong, 
narrow, tranfverfe plates. The colour of the back 
and fides is dufky or brown ; the middle of the 
back is marked with two rows of fmall black 
fpots, running from head to tail ; and from them 
proceed multitudes of lines of fpots crofling the 
fides. The plates on the belly are dufky; and 
the fcales on the fides are of a blueifli white colour. 
On each fide of the neck there is a fpot of pale 
yellow ; and the bafe of each is a triangular black 
fpot, one angle of which points toward the tall. 
The teeth, which are fmall and ferrated, are 
placed on each fide of the jaw in a double row. 
This animal, which is perfecl-ly innoxious, feeds 
on frogs, infects, worms, and mice; and lodges 
among buflies in moift fituations. It lays it's 
eggs in dunghills and hot-beds, whofe heat, aided 
by chat of the fun, promotes the exciufion of it's 
young; and, during winter, condnucs torpid in 
the banks of hedges, and under old trees. 
Snake, Horned. See Cerastes. 
Snake, Oak. See Dryinvs. 
Snake, 
