INTRODUCTION. 



turbed, they exert cut of a Sheath, 

 or Cafe, and in Appearance make 

 a circular Motion in the Water, form- 

 ing a Current, that brings with it 

 the Prey they feed on. 



An ingenious Gentleman, * whom 

 I {hall have Occafion to cite more 

 at Large hereafter, " furmifes, that 

 <c thefe plumed Polypes are the very 

 ** fame Animals Mr. Lewenhoeck 

 iC took Notice of, as living in a 

 " Sheath or Cafe, (which they fallen 

 " to the Roots of Duck-weed) and 

 " c having two feeming Wheels with 

 cc a great many Teeth or Notch - 

 f< es, coming from their Heads, and 

 " turning round as it were upon 

 " an Axis, which Wheel-work at the 

 " leaft Touch is drawn into the Bo- 

 " dy, and the Body into the Sheath." 

 In Effedt, tho' they are much lefs 

 than thofe difcovered by Mr. c Crembley\ 

 they fcarce leem to differ in any thing 

 but Size, as one kind of Polype does 

 from another ; the little Variety that 

 may arife from the Number, and 

 Difpofition of their Arms, which 



varies 



* Mr. Baker's Natural Hijiory of the Polype, 

 Page 23. 



