M i c r o s c o p i c a l E s s a v s .
lion is quick, vacillatory, and interrupted. I f the water in which
it fwims fail, it affumes an oval form, is compreffed, and at laft
burfts. It is found in an infufion o f hay, generally about thirteen
hours after the infufion is made.
112. Kolpoda .Pirum. Fig. 20 and 21, Plate XXV.
Kolpoda convexa, ovalis, apice in rofirum producta. Convex
kolpoda, oval, the apex formed into a kind of beak.
The body is uniform and tr.anfparent, without any fenfible inequality,
the neck rather long, and a little b ent; it is of a pale
colour, and furnilhed with obfcure little globules. Fig. 20 re-
prefents this animalculum, 21 the fame dividing to form another,
a the fore-part, b the hind-part, c where it is dividing.
113. Kolpoda Cuneus,
Kolpoda clavata, teres, apice dentata. Clavated kolpoda,
round, the apex dentated.
This is a large animalculum, the body white, gelatinous,
without any diftinft vifcera. On the fore-part at one fide there is
a pellucid, bright, firiated pullule ; the apex is diftinguilhed by
three or four teeth, the hinder-part is fmaller than the fore-part,
with an obtufe termination, which it can bend in a Ipiral form.
M i c r o s c o p i c a l E s s a y s . 545
IX. G o x i u m.
Vermis inconfpicuus, fimplicilfimus, complanatus, angulatus.
An invifible, fimple, fmooth,. angular worm.
114. Gonium Petlorale. Fig, 17, Plate XXV,
Gonium quadrangulare, pellucidum moleculis fedecim fphteri-
cis. This gonium is quadrangular, pellucid, with fixteen fpherical
molecules,
Thefe fixteen little oval bodies are nearly equal in fize, of a
greenilh colour, pellucid, and fet in a quadrangular membrane,
like the jewels in the breaft-plate of the high-prieft, refleGing light
on both fides. It’s animality is evinced by it’s fpontaneous motion,
advancing alternately towards- the right and left; thefe little
bodies feem oval when in motion, round when at reft; the four
interior ones are a little larger than the reft. Found m pure
water.
113. Gonium Pulvinatum.
Gonium quadrangulare, opacum, pulvillis quatuor. Quadrangular,
opake, with four little pillows.
This appears under the microfcope as a little quadrangular
membrane, plain on both fides; with a deeper lens it looks like
a bolfter, formed of three or four cylindric pillows, flattened or
funk here and there. Thus it appeared to M. Muller on the firft
2 YJ examina