OPALINID CILIATE INFUSORIANS METCALF 



521 



Host: Rana limnocharis Wiegmann, one specimen, from Sitong 

 Ridge, Darjiling District, northern India, abundantly infected. 



Both the Indian and the Spanish parasites are very similar to C. 

 longa but are not nearly so long. The nuclei are elongated with theu- 

 long dimension across the body, as in C. longa. Some of the Darjiling 

 individuals show irregular shapes owing to repeated divisions, indi- 

 cating approach to the time of formation of gametes. In the infection 

 are a few much swollen individuals. It seems best to demote C. 

 hispanica from specific rank (Metcalf, 1923a), to class it as a sub- 

 species of C. longa, and to include the Darjiling specimens in spite of 

 their having some pecuhar, swollen individuals. Many species of 

 Cepedea have occasional enlarged forms. 



Measurements, in microns: Body (a) 166 by 21.7, (6) 315 by 26.1, 

 (d) 370 by 26. Other measurements of c: Nucleus 5 by 1.6, 4 by 1.2, 

 daughter nucleus 3, cross diameter of dividing nucleus 1.5; length of 

 cUia 6. 



CEPEDEA PLATA, new species 



Figure 80 



Type: U.S.N.M. No. 22643. 



Host: Hylafaber Wied. 



One of four specimens of this tree frog from Rio de Janeiro, Brazil, 

 and each of two from Angra dos Reis, in the same State, bore enormous 

 infections of this remarkably flat Cepedea. 



FiGUEB so.— Cepedea plata, new species, from Hvla faber: a and 6, X 117; c, X 505. 



Measurements, in microns: Length of body (a) 350, (6) 240; 

 interval between lines of cilia 1.7. 



