c.rac 



FIG. 71. Paramcccium caudal um. 



A, the livi.ii; animal from the ventral aspect, showing the covering of cilia, the 

 buccal groove (to the right) ending posteriorly in the mouth (mtk) and gullet 

 (gul) ; several food vacuoles (/. vac) and the two contractile vacuoles (c. vac). 

 (x 300.) 



263 



