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THE OPALINID CILIATE INFUSOKIAXS. 327 



Leptodactylus ocellatus {Z. hrasiliensis, "Z. antilliensis " ( ? ) ; 

 Brazil, Argentina, Uruguay. 



Leptodactylus prognathus ("Z. antilliensis ") ; Uruguay. 



Leptodactylus typhonius (Z. niagn/i) ; Venezuela. 



Limnodynastes dorsalis [Z. hinucleata) ; Australia. 



Limnodynastes tasmaniensis {Z. hinucleata) ; Australia. 



Limnomeadusa macroglossa ("Z. antilliensis ") ; Uruguay. 



Paludicola hihronii (Z. paludicolae, "Z. antilliensis'''')-^ Chile, 

 Uruguay. 



Paludicola hrachyops (Z. paludicolae') ; Venezuela. 



Paludicola hufonina (Z. patagoniensis) ; Patagonia. 



Pseudis mantidactyla ("Z. antilliensis ") ; Uruguay. 



Telmatohius jelsMi (Z. tehnatoMi) ; Ecuador, Peru. 

 Gastrophrjmidae (6 species of hosts, G species and subspecies of 

 Zellenella) . 



Afelopus stelzneri (Z. atelopyxena [stelzeri]) ; Paraguay. 



Atelopus varius (Z. atelopodos) ; Costa Pica. 



Atelopus vanus (Z. atelopyxena) ; Costa Pica. 



Engystomops pustulosus (Z. [engystomopsis'] ) ; Taboga Island, 

 Panama. 



Engystomops stentor (Z. {^engystomopsis']) ; southern Mexico, 



Hypopachus variolosus (Z. hypopacheos) ; Guatemala. 



Rhinoderma darwinii (Z. darwinii) / Chile. 

 Dendrohatinae (2 species of hosts, 1 species of Zelleriella). 



Dendrohates tinctoriics (Z. dendrohatidis) ; Costa Pica. 



Dendrohates typographus (Z. dendrohatidis) ; Costa Rica, Nica- 

 ragua. 

 Raninae (3 species of hosts, 3 species of Zelleriella). 



Phyllohates trinitatis (Z. [trinitathl ) ; Venezuela. 



Prostherapis houlengeri (Z. [houlengeri']) ] Colombia (South 

 America). 



Rana draytonii (Z. ranaxena) ,' California. 

 The Zelleriellas are best represented among the Leptodactylidae 

 and Bufonidae, the latter apparently originally an Equatorian 

 family. They are known from four Gastrophi-ynidae, from two 

 Pelobatidae, from three Hylidae, from five Ranidae, two of which 

 are of the subfamily Dendrohatinae and three from the subfamily 

 Raninae. Zelleriella is almost exclusively a western hemisphere 

 genus, there being but one. or possibly two, species known from 

 outside this area (fig. 248). Zelleriella hinucleata, in Limnodynastes 

 dorsalis and L. tasmajiiensis, occurs in Australia, and Z. nmcronu- 

 cleata is reported from "Asia" in Bufo melanbstictus, which is 

 abundant in eastern, southern, and southeastern Asia and in the 

 East Indies. Bezzenberger (1904), who describes a number of very 



