724 A N I M A 
rotatory motion. 13. The calvitium, is found hi the infla¬ 
tion of vegetables : the body is broad and flat, ’tilled with 
black molecules, and a few thort bridles. 14. The pvj- 
tulata, is found in fait water: it is convex ; one edge of 
the hinder part fmuated, both ends fet with hairs, and 
horns on the fore part. 
XV. Himantofus : a pellucid, invifible, and cirrated, 
worm. 1. The acarus, is lively, conical, ventricofe, full 
of black molecules, with a bright and tranf arent fore 
part. The lower part of the apex has rows of long hairs 
on the under part fet like rays; and it is continually mov¬ 
ing thefe and other hairs in various directions. 2. The 
ludio, is a lively diverting animalcule, full of fmall points, 
the fore part clubbed and a little bent, the hinder part 
narrow. The top of the head and middle of the back are 
furnifhed with long and vibrating hairs ; and three flexi¬ 
ble curls hang down from the fide of the head at a didance 
from each other. 5. The J'annio, is found in water where 
the lemna grows. The cilia are longer than the hairs, 
and are continually vibrating. 4. The volutator, is fhaped 
like a crefcent; the convex part has a row of hairs longed 
towards the tail, and underneath are four feet: it is very 
lively, and often turns round with a fwift circular motion. 
5. T he laiva, is long and cirrated in the middle ; the bo¬ 
dy is long; the hinder parts acute, and curved, pellucid, 
and filled with granular molecules. 6. The c/iaron, is 
found in fea-water, but rarely. It is oval, with longitu¬ 
dinal furrows, and feveral rows of hair below the middle, 
but none on the hinder part. 7. The corona, isa membra¬ 
nous lamina, very thin, pellucid, and lemilunar : the edge 
of the bafe thick fet with molecular intedines; the fore 
part furniffied with a kind of mane ; towards the hind part 
are three equal curved hairs or fpines. 
XVI. Vorticella : a naked worm with rotatory ci¬ 
lia, capable of contrafling'and extending itfelf. 1. The 
viridis , is vifible to the naked eye, appearing like a fmall 
green point: it appears to be deditute of limbs, notwith- 
llanding which it keeps the water in continual motion ; fo 
that it probably has fome invifible rotatory indrument. 
2. The fpheroida, appears alfo like a point: it occafions 
a vehement motion in the water, probably by means of 
fome Ihort hairs with which it is furnifhed. 3. The' cinEla, 
is of an irregular fnape, fometimes alfumingan oval figure, 
and appearing as if girt round with a tranfverfe keel. 
4. The lunifera, is found in fait water; has the fore part 
obtufe, the bale broad, and hollowed away like a crefcent, 
with a fliort protuberance in the middle of the concave 
part. 3. The burfata, is found in fait water, and is ven¬ 
tricofe, crammed with molecules ; the fore part truncated, 
and boili lides of it pellucid. 6. The varia is cylindrical, 
truncated, opaque, and blackifh coloured ; the fore part 
ciliated. 7." The Jputarium, is found in OClober, with the 
fmaller lemna, and is one of the moft Angular of the 
animalcules. When viewed fideways, it is fometimes 
nearly cylindrical, only tapering a little towards the hind¬ 
er part, and having a broad pellucid edge. Viewed from 
the top, it has a broad face or dilk, furniflied with radia¬ 
ted hairs, of a dark green colour. 8. The polymorpha, is 
vifible to the naked eye, and appears like a green point 
moving with great agility; but, when viewed through a 
microfeope, it affumes fuch a variety of forms, that ft is 
iirmoflible to deferibe them. 9. The multiformis, is found 
in fait water, and very much refembles the former. 10. 
The nigra,, is found in Auguft in meadows covered with 
water : it may be feen with the naked eye, appearing like 
a black point fwimming on the furface. Through the 
microfeope it appears as a fmall conical body, obtufe and 
ventricofe at one end and acute at the other. It moves 
continually in a vacillating manner on the top of the wa¬ 
ter. 11. The cucullus, is likewife vifible to the naked eye : 
it is of a dirty red colour, of a Ihape fomewhat conical, 
and refembling a grenadier’s cap. 12. The utriculata , is 
green and ventricofe ; the belly capable of being length¬ 
ened or fhortened ; the fore part truncated, much in the 
Ihape of a common water-bottle. 13. The ocreala, is met 
L C U L E. 
with in rivers, and in fhape fomewhat refembles the lower 
part of a boot. The apex of the upper part is truncated 
and ciliated, the heel pointed, and the foot round. 14. 
The valga , is as broad as long, and the apex truncated anti 
ciliated : it is found in marfhy waters. 15. The pipillaris, 
is likewife found in marfbes where the conferva nitida 
grows: it is ventricofe; the fore part truncated, with a 
beautiful papillary excrefcence on the- fide. 16.‘ The fac¬ 
ulties, is thick, of an equal'diameter everywhere, and full 
of molecules. The edge of the mouth is bent back, with 
cilia on both fides. 17. The cirrala , is found in ditch wa¬ 
ter : it is ventricofe, the aperture fmuated, and two tufts 
of hair on each fide of the belly. 18. The naj'ula, is fur- 
nilhed with a rotatory organ encompalling the middle : it 
is pellucid, cylindrical, of an unequal fize ; the fore part 
truncated and ciliated, with a triangular prominence in the 
middle of the aperture ; the hinder part is obtufe, with a 
point on each fide the middle of the body. When the wa¬ 
ter is nearly exhaled, two rotatory organs are obfervable ; 
and the quick and various motions of this apparatus are 
very furprifing. 19. The fdlina, is of an orbicular ihape, 
with a molecular dlfk and ciliated margin. 20. The dif- 
cina, is likewife orbicular, the edge ciliated, with a kind of 
handle on the under fide. 21. The Jcyphina, is bowl-ffia- 
ped, cryftalline, with an opaque fpherule in the middle. 
22. The aliina, is cylindrical in the fore part, the hinder 
part tapering, and almoft ending in a point. 23. Th tfri- 
tillina, is empty and cylindrical, with a truncated apex. 
24. The truncatella, is of a larger kind of animalcules, 
with a chryftalline body, full of black molecules, the Ikin 
perfectly fmooth and colonrlefs, the hinder extremity 
rounded, and the anterior part truncated. 25. The lima- 
cina, is cylindrical, truncated, and has two pair of cilia. 
26. The fraxinina, is cylindrical, the hinder part tapering, 
and full of opaque molecules ; tranfparent towards the up¬ 
per end. 27. The cratezgaria , is found in April, both in 
the mud and on the tail of the monoculus quadricornis : 
they are generally heaped together in a fpherical form, and 
united to one common Italic : it has two fmall arms ; and 
with a powerful magnifier a violent rotatory motion may 
be obferved. 28. The hamata, with the body granulated, 
the fore part broad and truncated, the hinder part obtufe, 
and capable of being contracted or extended. 29. The 
crateriformis, is a lively animalcule, approaching fomewhat 
to a fquare figure, with convex fides : the head is fituated 
at the large end, the Ikin fmooth, and fome traces of in- 
teftines may be difeovered with difficulty. 39. The cana- 
liculaia, appears to the naked eye as a number of white 
points adhering to the fides of the glafs: it excites a con¬ 
tinual whirling motion in the water, by means of a rotato¬ 
ry organ with which it is furniflied. 31. The verfatilis , is 
a pellucid gelatinous animalcule, of a greeniffi colour, 
and furniffied with fmall radii about the circumference ; fo 
that it appears like a very fmall water hedge-hog. 32. The 
ampulla, is contained in a tranfparent bottle-fhaped bag ; 
the head divided into two lobes. 33. The Jolliculata, is 
gelatinous and cylindrical ; and when mod extended, the 
bale appears attenuated, and the apex truncated. 34. The 
larva, is of a clay colour, the aperture ciliated, with a glo¬ 
bular projection at times appearing fo proceed from it. 
35. The Jacculata , has the Ihape of an inverted cone, with 
an aperture in the figure of a crefcent; the lower part 
of the trunk notched, forming as it were two teeth ; the 
tail biphyllous. 36. The aurita, is cylindrical and ven¬ 
tricofe, the aperture deftitute of hairs; both (ides of it are 
furniffied with rotatory cilia, and the tail is biphyllous. 37. 
The tremula, has fomething of a conical Ihape ; the mouth 
being divided into parts which are let with fmall fpines ; 
and a point projects from the tail. 38.' The ferita, is 
mufcular, the fore part truncated : round the margin are 
rows of hairs ; but it has alfo Itiffer hairs or fpines conti¬ 
nually vibrating, with which it draws in all fubllances 
which it is able to manage. 39. The lacinulata , is Ihaped 
like an inverted cone, the aperture lobated, the tail fmall 
and furnifhed with two briftles. When fwimming, the 
3 rotatory 
