8 INTRODUCTION. 



but taking their Rife nearly from the 

 fame Point ; when contracted they 

 form irregular Curves, inclofing one 

 another. The Head and its whole 

 Apparatus may be exerted or re- 

 flate VI tra( ^ e d at Pleafure within the Ca- 

 Ffr 2. yit Y °^ t ^ e Shell, each Side of which 

 confifts of two Parts, adhering to- 

 gether by a thin Skin, which goes 

 between each Divifion, and turning 

 Plate vi. U pon one common Hinge. 

 3- 



When I had this Sea-produ&ion 

 firft under Confideration, I had but 

 an imperfedt Idea of Mr. Tremblefs 

 plumed Polypes, or Polypes ci panache \ 

 and confequently imagined, that it 

 might be in Large, what they are 

 in Miniature - y but fince I have had 

 the Happinefs of converfing with 

 that Gentleman, and feeing his curious 

 Difcoveries in this Particular, at the 

 lame time that I had the Honour 

 of (hewing him the Milt-veffels of 

 the Calamary y I am fatisfied, there 

 is at moft but a diftant Analogy. 

 They are defcribed by that Gentle- 

 man to have about their Head fifty 

 or threefcore little Horns, or Arms, 

 which when the Animal is undif- 



