C>83] 
this wonderful Head is moved. Tis probable, in- 
deed, that its Motion confifts in the opening and 
doling thefe Shells (Sect. Viil.) that (have off the 
Wood ; and that the inner Parts have a Power to 
move on all Sides, as the Ball does in the Socket of 
the Eye ; and perhaps to come forth of the(e Shells, 
and re-enter after taking their Food. But of thefe 
things there can be no Certainty, becaufe the Parts 
diffoive between the Fingers. 
Sect. XVII. 
The Body, viewed forward, (Fig. z.) is of a reddifh 
Colour. In the middle appears a Line, often dark- 
brown, often blackifh, fometimes not vifible, fome- 
timcs running near half the Length. The reft of 
the Animal is of a whitifh or grey Colour. 
1. If you intend to difted it, and examine the 
Infide, you muft firft remove a thin Membrane fur- 
rounding the whole Body, which for that Reafon 
may be called the Cutis or Cuticula. When this is 
removed, there appears an oblong Veffel placed in the 
Middle, (Fig. 2.) of a reddifh Colour, from the 
fhaved Wood, of which it is full : Hence it feeras to 
be the Stomach, or at.leaft the firft Orgaai of Di- 
geftion. 
2. In the lower Part you will find another VefTel, 
appearing like a dark-brown Line, which contains 
the Excrements, of which it is often found full, and 
difcharges them at the End of the Tail. 
3. At the Sides of the reddifh Veflel or Stomach 
^Sect. XVII. I.) is placed a white, clammy, fat Sub- 
ftance, (licking to the Fingers, and perhaps confti- 
tuting the Flefh of the Animal. 
Sect. 
