G40 MUIUEL l^OBEETSON AND K. A. M INCH IX. 



is seen. In fig. 43 the collar contains a foreign body, as in the right- 

 hand cell in fig. 48. 



Figs. 44-4(5. — Diaster-stages svitli daughter-flagella. In fig. 44 a 

 resting cell is drawn for comparison ; in fig. 4f> the cell is cut obliquely 

 and does not show the collar. 



Figs. 46a, 47. — Stages in the division of the cell-body. In fig. 46a the 

 collar is still seen ; in fig. 47 it has disappeared. 



Fig. 48. — Two young, recently divided collar-cells, drawn with three 

 ordinary resting collar-cells to show the manner in which the young 

 cells project above the level of the epithelium. The collar-cell on the 

 extreme right shows a foreign body lodged in the lumen of the collar. 



Fig. 49. — Four collar-cells, of which the two middle ones are evidently 

 a pair of sister-cells, the product of recent division, showing the nuclei 

 in the act of migrating down to the base of the cell. 



Figs. 50, 51. — Two collar-cells showing bodies (parasites P ) in the 

 cytoplasm. 



