1952. A review of the frogs and toads of Costa Rica. _Ibid._, 35:577-942. TAYLOR, E. H., and H. M. SMITH 1945. Summary of the collections of amphibians made in Mexico under the Walter Rathbone Bacon Traveling Scholarship. Proc. U.S. Natl. Mus., 95:521-613. TIHEN, J. A. 1960. Notes on Late Cenozoic hylid and leptodactylid frogs from Kansas, Oklahoma and Texas. Southwest. Nat., 5:66-70. WRIGHT, A. H., and A. A. WRIGHT 1949. Handbook of frogs and toads. 3rd ed. Comstock. 640 pp. YARROW, H. C. 1882. Checklist of North American Reptilia and Batrachia, with catalogue of specimens in U.S. National Museum. Bull. U.S. Natl. Mus., 24:1-249. ZWEIFEL, R. G. 1960. Results of the Puritan-American Museum of Natural History Expedition to Western Mexico. 9. Herpetology of the Tres Marias Islands. Bull. Amer. Mus. Nat. Hist., 119:81-128. TRANSCRIBER'S NOTES Although _Syrrhophus marnocki_ and _Syrrhophus marnockii_ both appear in this text, a literature search shows that both spellings have been used and the two instances where there is only one "i" at the end are in reference to priviously published names. Therefore, they were left as is. With the exception of the list below and a number of silent corrections, the text presented is that of the original printed version. Typographical Corrections Page Correction ==== ====================== 3 otherwse => otherwise 5 poltypic => polytypic 12 interorbtal => interorbital 14 neublosus => nebulosus 16 Cuidad => Ciudad 16 1946-170 => 1946:170 22 rubrimacultaus => rubrimaculatus 27 resemblence => resemblance Text Emphasis _Text_ - Italics =Text= - Bold