Of QInfering Polypes* 339 
to the naked Eye* bat before the Microfcope 
they appear very tranfparent, tho’with fome- 
what of a brownifh Call- Their Tails when 
contracted are drawn back and difpofed in 
fpiral Lines, like thofe of the Bell-Animal* 
defcribed pag, 330. 
The Species whofe Figure is given N° iv. 
is much mors uncommon,—Its main Stem 
and Branches refemble the foregoing, and 
fo does the general Figure of its Body, but 
its Mouth is remarkably different, for in¬ 
stead of the very fmall Fibrilke of the 1 aft- 
mentioned Species, the Head of this is fur- 
nifhed with two large Arms, by the vigorous 
Motions of which backwards and forwards, 
a Stream of Water is made to pafs by its 
Mouth, whereby the Creature is enabled to 
fupply itfelf with Food, which is taken in 
between thefe two Arms. And indeed it is 
amufing enough to obferve the Behaviour 
and Artifice of this little Creature upon the 
Occafion ; for as foon as the Prey is fwal- 
lowed down it inftantly retires to the main 
Stem, by contracting its Pedicle: and by flat¬ 
tening its Body, and bringing the Sides near-* 
ly together, it prevents any Poffibility of the 
Prey’s Efcape. After it has continued thus 
contracted for fome Time, it extends itfelf 
very leilurely, not unlike the Bell-Animal: 
but in our prefent Subject the Pedicle or 
Tail when contracted Teems as if it was 
fhrivelled up, whereas in that it falls back in 
, 2 2 ' fpiral 
