14 Ocean between "Europe and America. 



times 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 ap- 

 proached, it was feized by its forepaws, 

 killed and fucked ; for which reafon they 

 were careful to avoid their fate. It was 

 quite of the fhape of a fhrimp -, in fwim- 

 ming it moved always on one fide, the fides 

 and the tail moving alternately. It was ca- 

 pable of putting its forepaws entirely into 

 its mouth : its antennas 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 fhrimps. The former 

 moved when 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 Podura of Linnceus , they came In a mo- 

 ment to the furface of the water. In fwim- 

 ming they moved all 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 always funk to the bottom. The re- 

 maining 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 



