THE OPALINID CILIATE INFUSOEIAXS. 

 PROTOOPALINA MACROCAUDATA, new species. 



49 



Type.— United States National Museum Cat. No. 16439. 



Host. — Bombina {^Bomihinator] orientalis (Boulenger), United 

 States National Museum specimen No. 17529, female with eggs, 42 

 mm. long, from Fusan. Korea, 1885, P. L. Jouy, collector. 



a 



FIG. 24. PROTOOPALINA OKIENTAUS ; O AND h, USUAL CONDITION; C, A DAUGHTER CELL; 



d TO I, VARIETY IN FORM AND SIZE. a TO C, MAGNIFIED 460 DIAMETERS ; d TO J, MAGNI- 

 FIED 117 DIAMETERS. THE ANTERIOR ENDS ARE UP IN ALL FIGURES. 



Measurements — Length of body 0.09 mm 

 mm. ; length of posterior process 0.0217 mm. 

 mm. 

 mm. 



width of body 0.074 

 length of nucleus 0.03 

 width of nucleus 0.0142 mm. ; diameter of endospherule 0.0025 

 cilia line interval, anterior 0.00266 mm., posterior 0.0036 mm. 

 This Opalinid, though much smaller, resembles P. caudata form 

 lata in its appearance, but its nuclei bear eight instead of six macro- 



