2 The Hifiory ^/ANIMALS, 
v' 
making difeoveries than any of the common kinds, I have added feme unknown fpecies to 
the Animalcule kingdom ; but , notwithstanding this , the difeoveries made of the errors 
and falfities in the accounts of others, in improperly multiplying the known fpecies, have fb 
greatly reduced the lif of the juppofed Animalcules, that the number will aptear much 
fmaller here , than in any work that has been publified on the Jubjebh 
The moft obvious diftinCiions among thefe minute creatures are, that fome have , and 
others have not, tails j and that fome have , others have not vifible limbs. According 
to thefe' characters,' they may be conveniently arranged under three claffes: the frit, 
containing thofe which have no vifible limbs, nor any tail 5 the fecond, thofe which have 
tails j the third , thofe which have vifible limbs 5 difiinguijhed by the names of, i. Gvm~ 
nici 2. Cere aria j 3. Arthronia. 
ANIMALCULES. 
Clafs the Firfi . 
G Y M N I A. 
Thofe which have no tails , nor any vifible limbs . 
enchelides. Capillary Cel& 
A NIMALCULES, which have no vifible limbs or tails, and are of a cylin- 
dric or fubcylindric figure. 
Thefe have been mentioned by all the microfcopic writers, under the general name 
of Capillary Eels, but their figures have not been fufficiently attended to, and confe- 
quently the feveral fpecies have never been diflinguiffied. 
Enchelis corpore ntrinqne attenuato graciliori. 
The Enchelis , with a fender body fitnaller at the ends . 
This is an Animalcule of the fmaller kind, and is not vifible without confiderably 
powerful glades. It’s whole body is of the fame thicknefs, except that it becomes 
gradually fmaller at each end : it’s furface appears uniform and fmooth ; it’s colour is 
whitifh : it is very thin, in proportion to it’s length, and very nimble in it’s motions; 
it’s whole body is frequently convoluted and drawn into different figures; and, but for 
the obferving it’s progreffive motions, which are always made with the head forwards, 
it would not be eafy to diftinguifh at which extremity of the body that were placed. 
It is confiderably tranfparent, but lefs fo than fome of the others of this genus. 
It is frequent in the thin fkin that appears on the furface of the cold infufions of 
vegetable fubftances, after they have flood three or four days; an infufion of pepper 
ufually furnifhes great numbers of it, but it is in nothing fo certain and numerous, as ia 
water in which cubebs bruifed have been fome time infufed. 
Enchelis corpore crajfiori fiubcequali. 
The Enchelisy with a thicker and nearly equal body . 
This is not of the number of the very fmallefl Animalcules. It is oblong and thin, 
but confiderably thicker than the precedent fpecies : it is fo perfedly tranfparent, that 
there is fcarce any colour vifible in any part of it, but what there does appear is 
whitifh : it’s furface is perfedly fmooth and even, and the head and tail fcarce at all 
fmaller than the middle : it is but languid in it’s motions, and rarely alters the figure 
of it’s body. 
It is found in infufions of elder flowers, and many other vegetable fubflances : a 
third magnifier fhews it very diflindly. 
Enchelis 
