THE OPALINID CILIATE IXFUSORIAXS. 229 



the fact that there are numerous phenomena whose meaning we do 

 not understand, and that there is need of a thoroughgoing study of 



Fig. 20:i.— Ofalina kanauom, form pakv iiai.matak, X 400 uiametkks. 



at least one species of each of the subfamilies Protoopalhae and 

 Opalininae. 



