of Polypes. 21 



while, as it digefts and diflblves there, tlie 

 Form of it difappears, and it only gives a 

 Colouring to the Polypes Body: bodi which 

 Circumftances are moft remarkable in this 

 Kind 'y for in Thefe the Worm is difcerned 

 more plainly at the firft, and the Blood and 

 Juices afterwards, in Digeflion, give a plea- 

 fant ruddy Tinge; whereas they only render 

 others of a dark and dull Colour. 



But Thefe are more particularly diftingu idl- 

 ed by having Tails very long, clear and {len- 

 der, even in their moft contracted State, and 

 by Arms capable of a moft furprizing Exten- 

 lion (even to feveral Inches) tho' the Body is 

 not longer or larger than that of the other 

 Species, with little Knobs or Buttons at their 

 Extremities. A fuller Account of them will 

 be given, when I come to defcribe the won- 

 derful Structure of a Polypes Arm, and 

 therefore, it may be fufticient to obferve far- 

 ther here, that they feldom are more than 

 fix in Number. The Manner of their Ap- 

 pearance is {hewn in the following Page. 



C 3 From 



