ember.

1960. Two new geckos, genus _Phyllodactylus_ (Reptilia: Sauria), from
Michoacan, Mexico. Southwest. Nat., 5:37-42, April 15.

DOWLING, H. G.

1960. A taxonomic study of the ratsnakes, genus _Elaphe_ Fitzinger. VII.
The _triaspis_ section, Zoologica, 45:53-80, August 15.

DUELLMAN, W. E.

1954a. The salamander _Plethodon richmondi_ in southwestern Ohio.
Copeia, 1950 (1):40-45, February 19.

1954b. The amphibians and reptiles of Jorullo Volcano, Michoacan,
Mexico. Occ. Pap. Mus. Zool. Univ. Michigan, 560:1-24, October 22.

1955. A new whiptail lizard, genus _Cnemidorphorus_, from Mexico. Occ.
Pap. Mus. Zool. Univ. Michigan, 574:1-7, December 23.

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

1956b. A new snake of the genus _Leptotyphlops_ from Michoacan, Mexico.
Copeia, 1956 (2):93-94, May 29.

1957a. Sexual dimorphism in the hylid frog _Agalychnis dacnicolor_ Cope,
and the status of _Agalychnis alcorni_ Taylor. Herpetologica, 13:29-30,
March 30.

1957b. Notes on snakes from the Mexican state of Sinaloa. Herpetologica,
13:237-240, October 31.

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

1958b. Comments on the type locality and geographic distribution of
_Urosaurus gadowi_. Copeia, 1958 (1):48-49, February 21.

1958c. A preliminary analysis of the herpetofauna of Colima, Mexico.
Occ. Pap. Mus. Zool. Univ. Michigan, 589:1-22, March 21.

1959. Two new snakes, genus _Geophis_, from Michoacan, Mexico. Occ. Pap.
Mus. Zool. Univ. Michigan, 605:1-9, May 29.

1960a. A new subspecies of lizard, Cnemidophorus sacki, from Michoacan,
Mexico. Univ. Kansas Publ. Mus. Nat. Hist., 10:587-598, May 2.

1960b. A taxonomic study of the Middle American snake Pituophis deppei,
Univ. Kansas Publ. Mus. Nat. Hist., 10:599-610, May 2.

1960c. Variation, distribution, and ecology of the Mexican teiid lizard
_Cnemidophorus calidipes_. Copeia, 1960(2):97-101, June 29.

1960d. A distributional study of the amphibians of the Isthmus of
Tehuantepec, Mexico. Univ. Kansas Publ. Mus. Nat. Hist., 13:19-72,
August 16.

DUELLMAN, W. E., and DIXON, J. R.

1959. A new frog of the genus _Tomodactylus_ from Michoacan, Mexico.
Texas Jour. Sci., 11:78-82, March.

DUELLMAN, W. E., and DUELLMAN, A. S.

1959. Notes on the variation, distribution, and ecology of the i