Ocean between Europe and America. 1 1 



the little fhrimp moved as fwift as an arrow 

 round the glafs, but fometimes its motion was 

 flow, and fometimes it flood ftill on one fide, or 

 at the bottom of the glafs. If one. of the little 

 crabs approached, it was feized by its forepaws, 

 killed and fucked ; for which reafon they were 

 careful. to avoid their fate. It was quite of the 

 ihape of a {hrimp; in fwimming it moved always 

 on one fide, the fides, and the tail moving al- 

 ternately. It was capable of putting its fore- 

 paws entirely into its mouth : its antennae were 

 in continual motion. Having left thefe little 

 fhrimps together with the crabs during night, 

 I found on the morning all the crabs killed and 

 eaten by the mrimps. The former moved wherr 

 alive with incredible fwiftnefs in the water. 

 Sometimes when they were quite at the bottom 

 of the glafs, with a motion fomething like to 

 that of a Puceron or Podttra of Linnteus > they 

 came in a moment to the furface of the water. 

 In fwimming they moved al! their feet very clofe, 

 fometimes they held them down as other crabs 

 do, fometimes they lay on their backs, but as 

 foon as the motion of their feet ceafed, they al- 

 ways funk to the bottom. The remaining 

 fhrimps I preferved in fpirits, and the lofs of my 

 little crabs was foon repaired by other fpecimens 

 which are fo plentiful in each of the floating 

 bundles of gulf-weed. For a more minute de- 

 fcription of which I muft refer the reader to 

 another work I intend to publim. In fome 

 places we favv a crab of the fize of the fift, fwim- 

 ming by the continual motion of its feet, which 

 being at reft, the animal began immediately to 

 5 fink* 



