PHYLUM v PROTOZOA 



71 



Hetcromita, e.g. (Fig. 57) the anterior flagellum (fl. 1) only is 

 used in progression, the second or ventral flagellum (ft. 2) is trailed 



3.Asrosiof>is 

 2.0ikomonas(?) 



li.Dinobryon 



M \ 



12.Syncry f>r 



13.Anrho|ihysa H.Rhi|)idodendron 



Fio. 52. Various forms of Flagellata. In 2, flagellate (a) and amoeboid (&) phases are 

 shown ; in 5, flagellate (a) and -helio^oan (1) phases; in 8 are shown two stages in the in- 

 gestion of a food-particle (/.) ; chr. cnromatophores ; c. vac. contractile vacuole ; /. food par- 

 ticle g- gullet; 71*. nucleus ; I. lorica ; p. protoplasm ; per. peristome ; v.i. vacuole of ingestion. 

 (Mostly from Biitschli's Protozoa, after various authors.) 



behind Avhen the animal is swimming freely, or is used to anchor 

 it to various solid bodies. In some (Trypariosomes, Fig. 53) the 



