Of the Polype V Armi, 39 



of which being in continual Motion, form 

 together one of the moft furprizing Sights 

 in the World, The Strength of thele Arms, 

 the Purpofes whereto they ferve, and the 

 Dexterity of the Animal in the Management 

 of them, are alfo wonderful. They are em- 

 ployed both as Legs and Arms; for by means 

 of them the Folype crawls from place to 

 place, and with them he takes his Prey. The 

 Variety of their Poflure, and the Extenfion of 

 fome forts of tliem from one Line to theLength 

 of feveral Inches, is delightful and amazing. 



His Grace the Duke of Richmond, in a 

 Letter whicli you was fo obliging to commu- 

 nicate to the Royal Society, fays, if I re- 

 member right. That he faw fome Polypes in 

 Mr.TREMBLE y's Study at the Hague ^ hang- 

 ing by their Tails to the Surface of the Wa- 

 ter, in Glafs Jars a Foot deep, and extend- 

 ing their Arms nine or ten Inches down into 

 the Water. And I myfelf have frequently 

 feen them three or four Inches long, even 

 in our EngUJlj Polypes^ which are not, I be- 

 lieve, the fame Sort as thofe long-armed Ones 

 of his : mine too would probably have ex- 

 tended their Arms much farther, if the Vef- 

 fels I kept them in had been as convenient 

 for them, as Mr. Trembley's were *. 



* Mr. Leeuweniioek took notice of their being able 

 to extend their Arms fo furprizingly, that they feem'd, thro' 

 the Microfcope, to be feveral Fathoms in Lergth. Philof. 

 7ranfaa. N**. 283. 



D 4 Another 



