OPALINID CILIATE INFUSORIANS METCALF 



493 



one I have referred to, without definitely naming, as Z. [trinitatis] 

 (Metcalf, 1923a) and to Z. hylaxena Metcalf (op. cit.), but the dividing 

 nuclei differ from those of the latter species. It should not be named 

 without more detailed study of nonparasitized material. 



ZELLERIELLA [TRINITATIS] Metcalf 



Figure 47 



Host: Elosia lateristrigata Baumann,^ one specimen, from Angra dos 

 Keis, State of Rio de Janeiro, Brazil. 



Figure i7. —ZelleTiella Itrinitatis] Metcalf from Elosia lateristrigata: a, X 249; 6, X 460. 



Measurements, in microns: 



Measurement 



Large 



Large 

 (dividing) 



Small 



Length of body__ 

 Width of body__- 

 Length of nucleus 

 Width of nucleus- 



147 

 86 



24 5 

 17.2 



130 

 150 



50 



16.9 



80 

 48 

 12. 5 

 10 



This form resembles Z. [trinitatis] Metcalf (1923a) from Phyllohates 

 trinitatis Garman, from Venezuela, but the individuals from Elosia 

 were larger. Detailed cytological study of infections from both hosts, 

 which my material has not allowed, might well show diagnostic dif- 

 ferences, so I am only provisionally assigning the present forms to 

 the Venezuelan species, which itself was only provisional. 



» Possibly a wrong identification. 



