OPALINID CILIATE INFUSORIANS — TilETCALF 529 



OPAUNA RANARUM ORBICULATA 



Figure 93 



Host: Rana temporalis Giinther, from Bogawantalava, Ceylon, 

 4,000 feet altitude. 



Of six individuals opened, two (U.S.N.M. Nos. 67057 and 67058) 

 were well infected. The Opalinas were large and broad, almost 

 orbicular, their nuclei spheroidal, of moderate size, their cilia sparse, 

 the lines being widely spaced even at the anterior end. They resemble 

 the ranarum group rather than japonica in the shape of their posterior 

 ends. 



Measurements, in microns: (a) Body 210 by 160; (b) body 60 by 40, 

 (c) nuclei 6.9, 6.5, 5.8, 4.7, length of cilia 10, interval between lines 

 of cilia 4. Nucleoli 4. 



OPAUNA ZEYLONICA. new species 



Figure 94 



Type: U.S.N.M. No. 22645. 



Host: Polypedates eques (Giinther). 



Two out of five specimens (U.S.N.M. No. 6790, 37 mm. long, and 

 No. 67902, 19 mm. long) from Bogawantalava, Ceylon, well infected 

 with a large Opalina of unusually irregular shape and remarkably 

 dense ciliation (cilia lines with narrow interspaces). Nuclei mostly 

 somewhat pointed, usually at only one end, probably a reminder of 

 their previous division. 



Figure Qi— Opalina zeyloiiica, new S{)ecies, from Polypedates eques: a-c, X 78; d, X 673 

 166877—40 5 



