The Hifiory 0/" ANIMALS* j 
than in any other part, fo as to have the appearance of a neck: the head, at the ex¬ 
tremity of this, fometimes is thruft out, and appears roundifh, in form of a button; 
but more ufually it is drawn in, and the end is as it were truncated; It’s fkin is 
fmooth and pellucid; the traces of the inteftines are eafily feen through it: it’s mo¬ 
tions are flow and irregular, and the upper part of the body is frequently incurvated. 
It is found in many vegetable infufions: in none more plentiful than in that of the 
dried leaves of yarrow. A fourth magnifier will fhew it; a third gives all it’s parts 
diftindly. 
'go, medium nkrfus a?igufiaio. 
body , narrowefi toward the middle* 
Paramecium corpore 
The Paramecium , with an 
This is one of the fmaller Animalcules, but not of the moft minute kind. It’s 
length is equal to about twice and a half it’s diameter ; it is fomewhat flatted, and is 
confiderably larger at the tail than the head, and rounded at both thefe extremities ; 
but what is Angular in it’s figure is, that it has a cindture, as it were, toward the 
middle, but nearer the head than the tail, which gives it an appearance of being di¬ 
vided into two portions. It’s furface is fmooth, it’s colour brownifh ; it is confidera¬ 
bly tranfparent, and the traces of the inteftines are very vifible in it. It is tolerably 
nimble in it’s motions, and is apt to throw it’s body into various odd portions. 
It is frequent in vegetable infufions; that, of pepper often affords it; and a cold 
infufion of the nux vomica Scarce ever fails of fhewing numbers of it. 
•d 
v-rrt 
Paramecium corpore Mongo graciliore. 
The Paramecium , with a fiender^ oblong body* 
This is by much the flendereft of all the Animalcules of this genus, but it in no 
degree approaches to the figure of the capillary eels. It’s length is equal to about five 
times it’s diameter, and it has fomewhat of the general figure of a leecli; it is flat 
and thin; it’s furface is perfedly fmooth, and it’s fkin fo tranfparent, that the intef¬ 
tines are beautifully feen through it. It is thickeft and broadeft in the middle, and 
terminated obtufely at both ends : it is brifk and nimble in it’s motions, and is very 
diftindly feen with a third magni^er. 
I have met with it in great abundance in an infufion of zedoary root, and often in 
ditch water. „ ^ 
y * V X j i. . * i vjt At * • 
GRASP E D A R I A. 
A NIMALCULES without any vifibie limbs or tails, but with an apparent 
mouth, and a feries of fimbria round it, in manner of a fringe. 
Two fpecies of this genus have been figured by fome of the mierofcopical writers, 
but without names, or any accurate defcriptions. 
Crafpedarium corpore fuborbicularu 
The Crafpedarium , with a roundijh body& 
This is an Animalcule of the fmaller kind* It’s fhape is nearly orbicular, but 
fomewhat flatted, and, as it were, truncated flightly at the head, and at the oppofite 
extremity : it’s fkin is perfedly fmooth, and very tranfparent; the traces of the in¬ 
teftines are beautifully feen through it. The hinder extremity appears clofed, but the 
anterior one or head has an evidently open and large mouth, furrounded by a beautiful 
fringe or feries of flender, flexile filaments, which are in continual motion, and by 
that means draw lefier bodies, fuch as the little round animalcules, before defcribed, 
and otherSj about the opening of the mouth, for the readily fupplying the creature 
with food. The motions of this Animalcule are languid, and it’s general pofture is 
with the head upwards. The fringe about the mouth is in a continual vibratory 
motion. 
It is frequent in fhallow, muddy waters; a fecond magnifier fhews it diftin&ly. 
C 
Crafpedarium 
