THE OPALINID CILIATE INFUSOKIANS. 



113 



The animal shown in figure 78, c, is very highly vacuolated, the 

 vacuoles being especially developed near the nuclei. Its condition 

 is similar to that of a Protoopalina intestinalis which has been kept 

 for a couple of days or so in salt solution and has its axial system 

 of excretory vacuoles overemphasized. 



FIG. 79.— ZELLERIELLA [OF HYLA SEPTENTRIONALIS], X 460 DIAMETERS. 



ZELLERIELLA [of HYLA SEPTENTRIONALIS], new species (?). 



A specimen of this form has been deposited with the United 

 States National Museum as Cat. No. 16481. 



Eost.—Hyla septentHonalis Boulenger, one abundant mtection, 

 in United States National Museum specimen No. 32029 60 mm. 

 long, from New Providence, Bahama Islands, June 19, 190^; 

 " United States Fish Commission," collector. 



