velopment of opposable
digits and the associated lemuroid manner of climbing.

The known life histories of most species of _Phyllomedusa_, all species
of _Agalychnis_, and that of _Pachymedusa_ are similar.
Characteristically the tadpoles are generalized pelagic types that
develop in ponds, but at least some of the small specialized
_Phyllomedusa_ in southeastern Brazil have stream-adapted tadpoles with
funnel-shaped mouths (Cochran, 1955; Bokermann, 1966). Knowledge of the
life histories of the other species of _Phyllomedusa_ should aid in the
interpretation of the phylogenetic relationships of the several groups
of frogs now assigned to that genus.

ACKNOWLEDGMENTS

I am grateful to Linda Trueb who provided the osteological data
included, and who helped me in formulating some of the ideas expressed
in the discussion. This paper is a result of investigations on hylid
frogs supported by the National Science Foundation (NSF-GB-5818).

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