of feizmg its Prey, 69 



were contradled) as if they knew that Food 

 was not far off: but whether excited thereto 

 by Seeing or Smelling, or fome other way of 

 Information, I (hall not pretend to guefs: no 

 more than I fhall to determine, whether it 

 is Light or Heat, or fome other Caufe, that 

 induces them to extend their Bodies and 

 fpread their Arms, when brought out of a 

 dark Place into a light one, or placed near 

 a Candle, as they are almoft conftantly 

 found to do. Upon bringing a Worm to- 

 wards them, I. have likewife obferved often, 

 that they lengthen out and ftretch themfelves 

 forwards as much as poffible, before ever it 

 has touched their Arms. And, frequently, 

 upon dropping Worms in the Glaffes, tho' 

 at a Diftance from them, I have found 'em 

 devoured, after a very little while; but whe- 

 ther the Worms moved to them, or they to 

 the Worms, I cannot take upon me to affirm. 



Mr. TrembLey feeds \-\\s Polypes with 

 what he calls the Pucerons d'Eau^ which 

 I take to be our Pulices aquatici. In the 

 Letter before mentioned from the Duke 

 of Richmond, his Grace fays, that upon 

 Mr. Tr e mbl e y's flinging amongft his Poly- 

 pes fome of thefe nimble Animals, he faw 

 the Polypes^ both old and young, ftretching 

 out their Arms, catching and devouring them 

 with great Eagernefs : and that he could tell 

 what Number of them each Polype had eat, 

 by being able to difcern the black Eyes of 

 F 3 the 



