Part 21

1956. The frogs of the hylid genus Phrynohyas Fitzinger, 1843. Misc. Publ. Mus. Zool. Univ. Michigan, 96:1-47, pls. 1-6. February 21.

1958. A monographic study of the colubrid snake genus Leptodeira. Bull. Amer. Mus. Nat. Hist., 114:1-152, pls. 1-31. February 24.

1963a. A review of the Middle American tree frogs of the genus Ptychohyla. Univ. Kansas Publ. Mus. Nat. Hist., 15:297-349, pls. 11-18. October 18.

1963b. A new species of tree frog, genus Phyllomedusa, from Costa Rica. Rev. Biol. Trop., 11(1):1-23. October.

1964. A review of the frogs of the Hyla bistincta group. Univ. Kansas Publ. Mus. Nat. Hist., 15:469-491. March 2.

1965. Frogs of the Hyla taeniopus group. Copeia, no. 2:159-168. June 25.

DUELLMAN, W. E. and KLAAS, L. T.

1964. The biology of the hylid frog Triprion petasatus. Copeia, no. 2:308-321. June 30.

DUMERIL, A. M. C. and BIBRON, G.

1841. Erpetologie Generale ou histoire naturelle complete des reptiles, vol. 8, 792 pp.

DUNN, E. R.

1931a. The amphibians of Barro Colorado Island. Occas. Papers Boston Soc. Nat. Hist., 5:403-421. October 10.

1931b. The herpetological fauna of the Americas. Copeia, no. 3:106-119. October 30.

1944. Herpetology of the Bogota area. Rev. Acad. Colombiana Cien. Exact., Fis. Nat., 6:68-81.

FOUQUETTE, M. J., JR.

1960. Isolating mechanisms in three sympatric tree frogs in the Canal Zone. Evolution, 14:484-497. December.

FUNKHOUSER, ANNE

1957. A review of the neotropical tree-frogs of the genus Phyllomedusa. Occas. Papers Nat. Hist. Mus. Stanford Univ., 5:1-89. April 1.

GADOW, H.

1908. Through southern Mexico. London, Witherby and Co. xvi + 527 pp.

GAIGE, H. T., HARTWEG, N. and STUART, L. C.

1937. Notes on a collection of amphibians and reptiles from eastern Nicaragua. Occas. Papers Mus. Zool. Univ. Michigan, 357:1-18. October 26.

GOIN, C. J.

1961. Synopsis of the genera of hylid frogs. Ann. Carnegie Mus., 36:5-18. July 14.

GOSNER, K. L.

1960. A simplified table for staging anuran embryos and larvae with notes on identification. Herpetologica, 16:183-190. September 23.

GRIFFITHS, I.

1959. The phylogeny of Sminthillus limbatus and the status of the Brachycephalidae (Amphibia, Salientia). Proc. Zool. Soc. London, 132:457-487, pls. 1-4.