J^ONTISPIECE. 



A COLLARED MONAD. ^ MONO SIGA GRACILIS, SK. 

 Artificially fed with Ccu-trun^ ^ Tfve Arroivs denote the direction of the carrent, uuiace<i/ 

 if the rotatory motion, oF the. FLagellum, , cmd the covu-se taken, hj the Food/ particles on- 

 striking against and adhering to the extended Collar. cl. Collar. Jl. Flaqelhim. 



fcj Food glohvdes. n- Endoptast- or Nucleus. cv. Contractile vesicles. 



