484 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 87 



second, 31 mm. long, very abundantly infected; also a tadpole, 55 

 mm. long, in which were found some Protoopalina-like larvae. 

 Measurements, in microns: 



Measurement 



Body length 



Body width 



Nucleus length 



Nucleus width 



Cilia line interval. 



165 

 128 



18. 7 

 15 



100 

 65 

 19 

 13 



86 

 61 

 15 

 13 



50 



25 



5 



4 



40 

 14 



2 



1.2 



/ 



72 

 100 



12 



20 



84 

 9. 1 



1. 8 



ZELLERIELLA BRASILIENSIS (Pinto) (?) 



Figure 39 



In a tadpole of Leptodadylus ocellatus (Linnaeus) from Manguinhos, 

 Rio de Janeiro, Brazil, were two sorts of opalinids, one Zelleriella 



FiGUBK Z9.-- Zelleriella brasiliensis (Pinto) (?) from a tadpole of Leptodadylus ocellatus, X 820. 



(fig. 39), the other Cepedea. The tadpole measured (in mm.): Total 

 length 59, length of body 18, length of hind legs 12; no forelegs visible. 

 The Zelleriellas measured, in microns: 



Measurement 



Body length 



Body width 



Nucleus length 



Nucleus width 



Cilia length 



Interval between lines of cilia 



