Of the Calamary'j Suckers, 



The largeft Suckers are found up- 

 on the long Arms, and meafure, in 

 a Calamary of fixteen Inches, three 

 Tenths of an Inch in Diameter, and a- 

 bout as much in Depth, when the Ca- 

 vity is enlarged as far as the inverting 

 Membrane will permit. 



The Cavity of each Sucker feems 

 to the Eye to open into the tendinous 

 Stem ; which made me at firft fuf- 

 pect, it might have a Communica- 

 tion by fome fenfible Paflage into 

 the Body of the Arm, and this Com- 

 munication occafionally opened or 

 fhut by the Action of a Valve - y 

 but I foon undeceived myfelf, by 

 endeavouring feveral Times all ima- 

 ginable Ways to force Air, after I 

 had divided the Stem, thro' the fup- 

 pofed Paflage to no Purpofe, which 

 effectually excluded^ all Sufpicion of 

 any fuch fenfible Duct. 



CHAP. 



