312 GRIFFIN. 



Fig. 0. Part of a longitudinal section passing just inside the movith. s. o., 

 suboral membranellae; e. o., endoral cilia, which in this section are well 

 down on the anterior wall. 



7. Basal granules of three adoral niembranellie and the outlines of the 



grooves about their bases. 



8. Camera lucida sketch of a tangential section of the ventral surface, show- 



ing the rows of basal granules and some of the contractile ' fibrils of 

 the cirri. 



9. Contractile fibrils of the cirri, drawn from an unstained specimen fixed 



in corrosive-forniol-aeetic, followed by alcohol. 



10. Various shapes assumed by the meganucleus of Etiplotefi irorccslerl. 



11. Lateral view of Euplotes ivorcesteri showing the curvature of the mega- 



nucleus over the pharynx. 



12. Sketch of a vaculated meganucleus; drawn from the living animal. 



13. Drawings of the meganucleus of Euplotes vannus 0. F. il., copied from 



Minkiewicz. (Plate II, figure 23.) 



