392 Animalcules found in Water v 
had had his Book when this Infedt w-aS 
found, I fhould have made freer with it than 
I did, and not have preferved it to obferve 
'its Change of State. The Drawing of it I 
fend you, and for an Account of it refer you 
to Monfeur de Reaumur. 
This Infedfc was found in a Ciflern of Rain- 
Water in Augufl . The Length of its Body 
was 1 of an Inch, but its Tail was four Times 
the Length of the Body, though not extended 
near fo far as it was capable of being. Above 
Half of the Tail was covered with a line 
Down, in fmall circular Divifions, as the 
whole Body was: this Down or foft Sub- 
itance is of a fine reticular Make, and at the 
Head there appeared two Antennae within 
the outward Coat, which the Infedt by Means 
of thefe Antennae fpread out or dilated at 
Pleafure : fo that the downy Covering feem- 
cd not fo properly Part of the Xnfedt as to 
contain the Xnfedt. There were Fibres vi- 
fibly eroding upon the Back, and running 
down to the Tail : And near the Tail, be¬ 
tween thefe, a YefTel of a black Colour ap¬ 
peared, growing gradually lefs to the Extre¬ 
mity. The Colour of the Xnfedt was a pale 
Afh, the Tail and Antennae black, the Extre¬ 
mity of the Tail fet with Hair. 
I take this Xnfedt to be the fame with the 
Rat-tail’d Infect of Monfeur de Reaumur, but 
by the Figure you will fee it does not in all 
Refpdtes agree w T ith what he has deferibed i 
erha 
