1961. A new race of Bufo valliceps from Guatemala. Proc. Biol. Soc. Washington, 74:195-202, August 11.

1945. A preliminary analysis of the herpetofauna of Sonora. Bull. Amer. Mus. Nat. Hist., 83:297-426, March 30.

1881-1883 Étude des batraciens de l'Amerique Centrale. Mission scientifique au Mexique. Paris, Imprimerie Nationale, 3 (2):1-122, pls. 1-21.

1958. A review of the frogs of the genus Syrrhophus in western Mexico. Occas. Papers Mus. Zool. Univ. Michigan, 594:1-15, pls. 1-3, June 6.

1960. A distributional study of the amphibians of the Isthmus of Tehuantepec, MÉxico. Univ. Kansas Publ. Mus. Nat. Hist., 13:21-72, August 16.

1961. A record size for Drymarchon corais melanurus. Copeia, 1960 (4):367-368, January.

1932. Reptiles and amphibians from Honduras. Proc. Acad. Nat. Sci. Philadelphia, 84:21-32, March 22.

1957. A high-crested race of toad (Bufo valliceps) and other noteworthy reptiles and amphibians from southern Mexico. Herpetologica, 13:219-222, October 31.

1937. The vegetation of PetÉn. Carnegie Institute Washington Publ. 178:1-244, pls. 1-39. June 16.

1959. Studies on the amphibians and reptiles of British Honduras. Publ. Ross Allen's Reptile Inst., 2:1-76, November 10.

1932. Klimakunde von Mittelamerika. In Handbuch Klimakunde, 2:1-74, Taf. 1-13.

1936. Guatemalan salamanders of the genus Oedipus. Zool. Ser. Field Mus. Nat. Hist., 20:135-166, October 31.

1941. The amphibians and reptiles of British Honduras. Zool. Ser. Field Mus. Nat. Hist, 22:475-510, December 30.

1946. Turtles collected by the Smithsonian Biological Survey of the PanamÁ Canal Zone. Smithsonian Misc. Coll., 106 (8):1-9, pl. 1, August 1.

1960. Notes on the measurement of faunal resemblance. Amer. Jour. Sci., 258-A:300-311.

1945. An annotated checklist and key to the snakes of Mexico. Bull. U. S. Natl. Mus., 187: iv + 239 pp., October 5.

1948. An annotated checklist and key to the amphibia of Mexico. Bull. U. S. Natl. Mus., 194: iv + 118 pp., June 17.

1950. An annotated checklist and key to the reptiles of Mexico exclusive of the snakes. Bull. U. S. Natl. Mus., 199: v + 253 pp., October 26.

1934. A contribution to a knowledge of the herpetological fauna of El Peten, Guatemala. Occas. Papers Mus. Zool. Univ. Michigan, 292:1-18, June 29.

1935. A contribution to a knowledge of the herpetology of a portion of the savanna region of central PetÉn, Guatemala. Misc. Publ. Mus. Zool. Univ. Michigan, 29:1-56, pls. 1-4, October 1.

1937. Some further notes on the amphibians and reptiles of the Peten forest of northern Guatemala. Copeia, 1937 (1):67-70, April 10.

1941a. Studies of Neotropical Colubrinae VIII. A revision of the genus Dryadophis Stuart, 1939. Misc. Publ. Mus. Zool. Univ. Michigan, 49:1-105, pls. 1-4, March 19.

1941b. Two new species of Eleutherodactylus from Guatemala. Proc. Biol. Soc. Washington, 54:197-200, December 8.

1943. Taxonomic and geographic comments on Guatemalan salamanders of the genus Oedipus. Misc. Publ. Mus. Zool. Univ. Michigan, 56:1-33, pls. 1-2, January 30.

1948. The amphibians and reptiles of Alta Verapaz, Guatemala. Misc. Publ. Mus. Zool. Univ. Michigan, 69:1-109, June 12.

1950. A geographic study of the herpetofauna of Alta Verapaz, Guatemala. Contr. Lab. Vert. Biol. Univ. Michigan, 45:1-77, pls. 1-9, May.

1958. A study of the herpetofauna of the Uaxactun-Tikal area of northern El Peten, Guatemala. Contr. Lab. Vert. Biol. Univ. Michigan, 75:1-30, June.

1936. A taxonomic study of the cosmopolitan scincoid lizards of the genus Eumeces. Univ. Kansas Sci. Bull., 23:1-643, August 15.

1954. Further studies on the serpents of Costa Rica. Univ. Kansas Sci. Bull., 36:673-801, July 15.

1945. Summary of collections of amphibians made in Mexico under the Walter Rathbone Bacon Traveling Scholarship. Proc. U. S. Natl. Mus., 95:521-613, June 30.