58 PLAT-E yXXVI. 
This fpecies of Vorticella, without the afiftance of a micros 
{cope, refembles fo many fmall black fpecks, fwimming on the wa-. 
ter, particularly in meadows which are inundated. They are con- 
ftantly in motion; and two fmall white hooks are perceptible by 
glaffes at 1—1; by the help of thofe it is fuppofed to fwim, or they 
may inclofe fome rotatory organ. The infe&t is opaque. 
PLATE 
