720 A N I M A 
found in the infufions of vegetables which have been kept 
for fome weeks. Its body is of a whitifh colour, fre¬ 
quently convoluted, and drawn into different figures. 
19. The coluber, is found in river-water; the tail is ex¬ 
tremely final 1 ; and the mouth, oefophagus, inteflines, and 
the twiflings of them, are eafily difeerned. 20. The 
anguillula is divided into four varieties: 1. The vinegar 
eel ; 2. That in pafle ; 3. That of frelh water; and, 4. 
That of fait. Fig. 9, in the annexed plate, reprefents one 
of the cels in pafle, very conliderably magnified. 21. The 
linter, or ventricofe oval vibrio, with a (hort neck, is found 
among the lemna, but not very frequently. It is among 
the larger kinds of animalcules, egg-fhaped, pellucid, and 
fomewhat deprefled at top. 22. The utriculus reicmbles 
a bottle ; tlie belly is full of molecular inteflines, the neck 
bright and clear, the top truncated, and fome have a pel¬ 
lucid point at the bottom of rite belly. 23. The fafciola 
is found in water juft freed from the troft, and not often in 
■any other fluid. It is pellucid, with inteflines like points 
in the middle. Its motion is very quick. 24. The co- 
lymbus is larger than many of the other fpecies of vibrio, 
and refembles a bird in (hape. 25. The friclus, has a 
linear body, being a bright membranaceous thread; the 
hinder part fomewhat thicker, round, and filled with 
molecules, excepting at the end, where there is a fmall, 
empty, pellucid, (pace. 26. 1 he anas, with, both ends 
attenuated, and tlse neck longer than the tail, is found in 
fait water ; though a kind is likewife found in frefh water 
with a neck longer than the other. 27. The cygnus is a 
very pellucid line, crooked at top, dwelling in the middle, 
and (harp at the end ; the middle full of dark coloured 
molecules and pellucid inteflines. 28. Tip tanfer is found 
in water where duckweed grows. The trunk is elliptic, 
round, and without any inequality on the (ides. It is full 
of molecules: the hind part (harp and bright; the fore 
part produced into a bending neck, longer than the body. 
It moves the body (lowly, but the neck morebrifkly. 29. 
The olor is found in water that has been kept for a long 
time, and is full of vegetable green matter. The body 
is elliptical and ventricofe; the neck is three or four times 
longer than the body, of an equal (ize throughout, and is 
moved very quickly. 30. The falx , with a crooked neck, 
and obtufe hinder part, is pellucid and elliptical; the fore 
part leflening into a little, round, bright, neck, nearly as 
long as the trunk. 31. The intermedius, appears to be an 
intermediate fpecies betwixt the falx and the fafciola: it 
feents to be a thin membrane, conftantly folded, and has 
all round a diftinbl bright margin. 
VI. Cyclidium : a Ample, invifible, flat, pellucid, or¬ 
bicular or oval, worm. 1. The bulla, or orbicular bright 
cyclidium : this is found occafionally in an infufion of hay ; 
it is very pellucid and white, moves (lowly, and in a femi- 
circular direction. 2. The mitlium is very pellucid, and 
fplendid like cryftal; of an elliptical figure: and its mo¬ 
tion is fvvift, interrupted, and fluttering. 3. The fuitans, 
is one of the fmalleft animalcules; the body fomewhat of 
an oval (hape, with two fmall blue fpaces at the (ides. 4. 
The glaucoma has an oval pellucid body, with both ends 
plain : the inteflines are fo tranfparent, that they can fcarce- 
ly be difeerned when empty ; when full they are of a green 
colour, and, when it (eenis to be taking in water, the in- 
tellines are in a violent commotion: it generates by divi- 
lion. 5. The nigricans is very fmall, pellucid, and flat, 
with a black margin. 6. The rofratium is oval, fmooth, 
and very pellucid, with the fore part running out into an 
obtufe point, with which it feems to feel and examine the 
bodies to which it comes. 7. The nucleus, refembles a 
grape-feed, the body being pellucid and deprefled, the 
fore part obtulely convex, and the hind part acute. 8. 
The hyaliaum, has a tremulous kind of motion; the body 
oval, flat, and bright, without any viflble inteflines., 9. 
'I he pediculu t, is fcarcely ever feen but on the hydra pal¬ 
lida, upon which it runs as if it had feet; it is gelatinous 
and white, and the bottom gibbous over the back. io n 
'l he dubiuirtf is of an.oval fnape, with one fide convex, the 
L C U L E. 
other concave; the margin pellucid, and the inner part 
containing a great number of molecules. 
VII. Paramecium: an invifible, membranaceous, 
flat, and pellucid, worm. 1. The aurelia, is membrana¬ 
ceous, pellucid, and four times longer than it is broad; 
the fore part obtufe and tranfparent; the hind part filled 
with molecules: it is found in ditches where there is plen¬ 
ty of duckweed. 2. The ckryfalis, is found in fait water, 
and differs very little from the former, only the ends are 
more obtufe, and the margins are filled w ith black glo¬ 
bules. 3. The verfutum , is found in ditches, and has an 
oblong, green, and gelatinous, body, filled with molecules: 
it propagates by divifion. 4. The oviferum, is membrana¬ 
ceous, oval, grey, and pellucid, with many oval corpufcles 
difperfed through the body. 5. The marginatum, is flat, 
elliptical, and every where filled with molecules; it is 
furrounded by a broad double margin, and a bright Ipiral 
intefiine is obfervable. 
VIII. Kolpoda : aninvifible, pellucid, flat, and crook¬ 
ed, worm. x. The lamella, is very feldom met with: it 
refembles a long, narrow, and pellucid, membrane, with 
the hind part obtufe, narrower, and curved towards the 
top. 2. The gallinula, is found in fetid fait water; and 
has the apex fomewhat bent, the belly oval, convex, and 
ftriated. 3. The rofrum, is found, though feldom, in wa¬ 
ter where the lernna grows, and has a flow and horizontal 
motion; the fore part is bent into a kind of hook; the 
hind part obtufe, and quite filled with black molecules. 
4. The ochrea, is deprelfed, membranaceous, and flexible; 
one edge nearly Ilraight; the other fomewhat bent. 5. 
The mucronata, is a dilated bright membrane; the apex an 
obtufe point, with a broad marked border running quite 
round it; it is filled with grey molecules, and has a trun¬ 
cated appearance. 6. The triquetra, was found in fait 
water, and appears to conlift of two membranes ; the up¬ 
per (ide flattened, the lower convex, with the apex bent 
into a kind of (houlder. 7. The friata , is likewile found 
in fait water, and is very pellucid and white, with the up¬ 
per part rather bent, and terminating in a point. 8. The 
nucleus, is of an oval (hape, with the vertex pointed, and 
of a brilliant tranfparency, by which the vifeera are ren¬ 
dered viflble; thefe conlift of a number of round diapha¬ 
nous velicles. 9. The mcleagris, has a dilated membrane, 
with very fine folds, which it varies in a moment; the 
fore part of the body to the middle is clear and bright; 
the hind part varioully folded in tranfverfe and elevated 
plaits, and full of molecules. 10. The ajfimilis, is found on 
the fea-coaft, and has an elliptic mafs in the middle, but 
is not folded like the former. 11. The cucullus, is fount), 
in vegetable infufions, and in fetid hay ; moving in all di- 
redlions, and commonly with great vivaciry: it is very 
pellucid, and has a well-defined margin, filled wdth little 
bright veficles differing in (ize, and of no certain number: 
from fome circumftances it would feem probable that this 
animalcule cads its (kin, as is the cafe with fome infe£ts. 
12. The cucullulus, is found in an infulion of the fonchus 
arvenfis: it is very pellucid and cryftalline, and lias an 
oblique incilion a little below the apex. 13. The cuculio , 
is elliptical, flat on the upper fide, and ccnxex on the un¬ 
der; the fore part is clear, and from the middle to the 
hinder part is full of (ilver-like globules. 14. The >en, or 
crajfa, is found in an infufion of hay, commonly about 
thirteen hours after the infufion is made, and has a quick 
and vacillatory motion : its body is yellow, thick, and 
fomewhat opaque; curved a little in the middle, fo that 
it refembles a kidney; and full of molecules. 15. The 
pirum, has an uniform and tranfparent body, and is of a 
pale colour, with obfeure little globules : it propagates by 
divifion. 16. Th ccuneus, is white, gelatinous, and with¬ 
out any diftincl vifeera ; the apex has three or four teeth; 
and it can bend the hinder part into a fpiral form. 
IX. Gonium: an invifible, Ample, fmooth, and angu¬ 
lar, worm. 1. The pedoralc, is found in pure water, and 
moves alternately towards the right and left. It is qua¬ 
drangular and pellucid, with fixteen iberical molecules 
of 
