40 PLATE XVII, 



F I G. Ill, 



TRICHOBA V E R M ICULAR1S. 



GENER I C CHJRJCTE R, 

 An invifible, pellucid, hairy worm. 



SPECIFIC CHARACTER, 



Long cylindrical trichoda, with a fliort neck, the apex hairy. 



Is found in river water, and can afftjme various forms, as in oitf 

 figure fhewn. 



P h A T E 



