the tiifory of ANIMAL S', : ‘ gz 
Macrocercus, cor porefubovato depreffo, extremitatem v erf us attenuate . 
The Macrocercus, tw/A « fuhoval deprejfed body , with a tail very fmall 
toward the end. 
This is alfo one of the minuted of the Animalcule clafs. The body is of an oval 
fip-ure deprefled or flatted, and fomewhat larger toward the head, than at the other 
extremity. It’s furface is fmooth and glofly; it’s fldn white and femitranfparent, and 
it’s tail about flx times the length of the body ; confiderably thick at it’s infertion, but 
gradually growing fmaller towards the extremity, where it terminates in a fcarce vifible 
filament. „ , . T 
This is abundant in the hurftan femen, and in that of all the monkey tribe, it re¬ 
quires a firft magnifier to fhew it diflindly. 
Macrocercus, corpore longiore fubcylindrico. 
The Macrocercus, with an oblong fubcylindric body . * 
This alfo is an Animalcule of the minuted: kind. The body is oblong, and nearly 
cylindric, but fomewhat fmaller at the hinder extremity: it’s length is about three 
times it’s diameter j it’s furface is perfedly fmooth ; it’s fldn white, and femitranfpa¬ 
rent: it’s tail is very long, thicked at it’s infertion, and gradually fmaller alUhe way 
to the extremity : it’s motions are very fwift, and it’s tail frequently twided and 
convoluted. 
It is found in the femen of all the dog kind, as alfo in that of the cat, the hedgehog, 
the mole, and the bat. 
Macrocercus corpore articulate. 
The Macrocercus, with an articulated body. 
This is alfo of the number of the mod minute Animalcules. It’s body is oblong, 
and compofed, as it were, of three or four parts, or articulations, each of a roundifli 
figure, and joined in a feries to one another; the w r hole is, in length, equal to three or 
four times it’s diameter, and exhibits much the fame figure that a foft cylindric 
body of any kind would, if tied round with a thread, in two or three places, at equal 
didances: the tail is of fix or feven times the length of the body, and is very thick at 
the infertion, and gradually fmaller to the extremity. The fldn of the whole Animal¬ 
cule is white, foft, glofly, and femitranfparent. 
It is found in the femen of the horfe, the boar, and fome other animals. 
Macrocercus corpore cylindrico longiore, in caudam tenuijjimayn defnente. 
The Macrocercus, with a very long cylindric body, terminating in a 
fender tail. 
This is alfo of the number of the fmallefl Animalcules: it’s body is long, {lender, 
and of a conic figure ; it is of ten times it’s diameter in length, and is thicked at the 
head, where it appears truncated j and whence it is continued fmaller a^d fmaller to the 
tail, which is a continuation of the body, is equal to about twice it’s length, and is all 
the way extreamly {lender, but particularly toward the extremity. The fldn of the 
whole is fmooth, the colour white, and the body fomewhat traniparent. 
It is found in the femen of the toad, and of the lizard, and ferpent kinds: It re¬ 
quires a fird magnifier to didinguifh it. 
Macrocercus corpore orbiculato depreffo. 
The Macrocercus, with a deprejfed orbiculated body. 
This is a very minute Animalcule : it’s body is of a rounded figure, but deprefled or 
flatted, and it’s tail is equal to ten times it’s diameter in length : the fldn of the whole is 
whitifli, with a cad of yellow, fmooth and glofly, but not at all traniparent: it is very 
nimble in it’s motions j and the tail, which is very {lender at the extremity, is fre¬ 
quently twified about in a very furprifing manner. 
It is found in the femen of the drone bee, and of many other in feds. 
D ' ANIMALCULES . 
