1962. The American leptodactylid frog genus _Eleutherodactylus_, _Hylodes_ (= _Elosia_), and _Caudiverbera_ (= _Calytocephalus_). Copeia, 1:195-202, April 11. NOBLE, G. K. 1925. An outline of the relation of the ontogeny to phylogeny within the Amphibia. I. Amer. Mus. Nov., 165:1-17, April 16. PIATT, J. 1934. The systematic status of Eleutherodactylus latrans (Cope). Amer. Midl. Nat., 15:89-91, February 15. SMITH, H. M. and TAYLOR, E. H. 1948. An annotated checklist and key to the Amphibia of Mexico. Bull. U. S. Natl. Mus., 194:1-118. June 7. TAYLOR, E. H. 1952. A review of the frogs and toads of Costa Rica. Univ. Kansas Sci. Bull., 35:577-942, July 1. ZWEIFEL, R. G. 1956. A survey of the frogs of the _augusti_ group, genus _Eleutherodactylus_. Amer. Mus. Novitates, 1813:1-35, December 23. _Transmitted July 11, 1967._ 31-9418 * * * * * Transcriber's Notes Bold text is shown within ~tildes~. Italicized text is shown within _underscores_. Illustrations have been moved to avoid breaking up paragraphs of text. Page 507: Changed know to known (are not know in Tomodactylus). Page 507: Added closing parenthesis in Fig. 2 caption after x 3. Page 509: Changed compeltely to completely (compeltely roofed skulls). Page 512: Veracruuz may be a typo for Veracruz (Sinaloa to Veracruuz). Page 514: Changed two occurrences of Hylatophryne to Hylactophryne.