274 Of the Wheel Animah 
of a Watch, appear projecting forwards be« 
yond the Head, and extending tideways 
fomewhat wider than the Diameter thereof. 
They have very much the Similitude of 
Wheels, and feem to turn round with a 
coniiderable Degree of Velocity, by which 
Means a pretty rapid Current of Water is 
brought from a great Diftance to the very 
Mouth of the Creature, who is thereby 
Supplied with many little Animalcules and 
various Particles of Matter that the Waters 
are furnifhed with. 
As thefe Wheels (for fo from their Appear¬ 
ance I dial! beg Leave to pall them) are every 
where exceffively tranfparent, except about 
their circular Rim or Edge on which the 
Cogs or Teeth appear, it is very difficult to 
determine by what Contrivance they are 
turned about, or what their real Figure is, 
though they feem exadlly to referable Wheels 
nioving round upon an Axis. 
It is alfo hardly poffible to be certain 
whether thefe circular Bodies, round the 
Edges of which the Teeth are placed, are 
of a hat Form, or hollow and of a conic 
Figure. But they appear rather to be the 
latter; and if fo, they may be likened, not 
improperly, to a Couple of fmall Funnels 
with Teeth fet round their large Ends. 
However, be they flat or hollow, they leem 
plainly to be protruded from a Pair of tubu¬ 
lar Cafes, into which they can be again re¬ 
tracted 
