&34 °f the Hair-like InfetL 
This little Animal (the Form whereof may 
he feen Plate XX. N° I.) is extremely ilen- 
der, and not uncommonly one hundred and 
fifty times longer than broad. Its Refem* 
blance to an Hair has induced us to call it 
the Hair-like InfeSi. The Body, or Middle 
Part, which is nearly ftrait, appears in feme 
compofed of fuch parallel Rings as the 
Windpipe of Land Animals con flit of, but 
feems in others fealed, or rather made up of 
Rings that obliquely crofs each other. This 
Difference may be feen in the two Figures 
F, G. Its two Ends are bent, or hooked, 
pretty nearly in the fame Degree, but in a 
Direction contrary to each other; and, as 
no Eyes can be difeerned, his difficult to 
judge which is the Head or Tail. 
Its progrefiive Motion difiers from that of 
all Animals befides hitherto deferibed, for 
notwithstanding the Body is compofed of 
many Rings and Joints, it feems unable to 
bend at all, or move diredlly forwards : but 
when it is inclinable to change its Quarters, 
it can move from Right to Left, or Left to 
Right, and proceed at the fame Time back** 
wards or forwards obliquely. And this it 
performs, by turning one End about, the 
Quarter of a Circle, as the Arc a h fhews; 
then it.does the fame with the other End, 
and To alternately ; whereby its Progreffion 
is in a diagonal Line, or from Corner to 
Corner; as whoever will take the Trouble 
