THE OPALINID CILIATE INFUSORIANS. 



179 



FIG. 144.-OPALINA OBTR.GON-O.DBA, FROM SCAPHIOPDS «0^'^^«'"« =^«' ^^"^ ^^ ^,*^:;'";; 

 460 DIAMETERS ; C, A GROUP OF ANIMALS SHOWING RANGE OF SIZE AND FORM IN ONS 

 INFKCTION, X 117 DIAMETHRS. 



