The relationships of _Allophryne_ cannot be understood without a re-analysis of some of the features used as major criteria in frog classification (the nature of an intercalated cartilage; the nature of the sternal complex; the relative value of cranial osteology; the vertebral structure; and the thigh musculature). Some of these features have been investigated by other workers, most notably Griffiths, but others have not and need re-examination. A re-analysis of some of the major criteria used in frog classification is in progress (Callison, Lynch, and Trueb) and upon completion of that study we think the relationships of _Allophryne_ will become apparent. A more comprehensive study of the cranial anatomy of certain hylids, leptodactylids, dendrobatids, and atelopodids along with that of _Allophryne_ is needed to clarify the relationships of _Allophryne_, and might indicate that the recognition of a fifth family is necessary. CONCLUSION Among currently recognized families of frogs, _Allophryne_ is least different from the Hylidae although it is our opinion that inclusion of this genus in the Hylidae probably represents an unnatural classification. However, the present evidence suggesting that _Allophryne_ should be in another family is less convincing than evidence suggesting it should be in the Hylidae. We tentatively place _Allophryne_ in the Hylidae. LITERATURE CITED DAVIS, D. D. and GORE, U. R. 1936. Clearing and staining skeletons of small vertebrates. Fieldiana: Technique, 4:1-16. DUELLMAN, W. E. 1956. The frogs of the hylid genus _Phrynohyas_ Fitzinger, 1843. Misc. Publs. Mus. Zool., Univ. Michigan, 96:1-47, February 21. GAIGE, H. T. 1926. A new frog from British Guiana. Occas. Papers Mus. Zool., Univ. Michigan, 176:1-3, October 14. GALLARDO, J. M. 1965. A proposito de los Leptodactylidae (Amphibia Anura). Papeis Avulsos, 17:77-87, January 1. GRIFFITHS, I. 1959. The phylogeny of _Sminthillus limbatus_ and the status of the Brachycephalidae (Amphibia: Salientia). Proc. Zool. Soc. London, 132:457-87, May. NOBLE, G. K. 1931. The biology of the amphibia. McGraw-Hill, New York, vii + 577 pp. _Transmitted August 2, 1966._ 31-5378 * * * * * Transcriber's Notes Italicized text is shown within _underscores_. Bold text is shown within ~tildes~. Table 1 and Figs. 2 and 3 have been moved slightly to avoid breaking up the paragraphs of text.