H. J. Clark on Anthophysa Miilleri. 227 
then the cilia return to their usual positions, while the intro- 
cepted edible passes toward the center of the body, and is there 
immediately enclosed in a digestive vacuole. For a while the 
food dances about in this vacuole with a very lively motion, but 
finally it subsides into quietude. ses 
The contractile vesicle.—There is a two-fold difficulty in discov- 
ering the presence of this organ. In the first place it is compar- 
very rarely possible to see it contract twice in succession be- 
tween any two of the abrupt, lateral deviations of the body, 
about half way between the two ends of the body, and nearly 
midway betwixt the two extremes of its greater dia 
meter. At 
the completion of its diastole it has a circular outline, and ap- 
Nowish 
