THE OPALINID CILIATE INFUSORIANS, 



291 



HYLIDAE, predominantly American, mostly from tropical Amer- 

 ica, but well represented in North America and also in Australia 

 (fig. 227). Several genera, but no species, are common to America 

 and Australia. Three closely related species (or subspecies) are 



found in temperate Asia, Europe, and northwestern Africa, these be- 

 ino- the only Palearctic forms, except a species of HyU, of uncertain 

 affinities which has recently been described from Abyssinia. 



Amphignathodontinae, one species m Ecuador. 



Hylinae, same distribution as the Hylidae. 



