A New Subspecies of Lizard, Cnemidophorus sacki, from Michoacán, México

A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, México

Amphibians and Reptiles of the Rainforests of Southern El Petén, Guatemala

Neotropical Hylid Frogs, Genus Smilisca

A Synopsis of Neotropical Hylid Frogs, Genus Osteocephalus

Systematic Status of the Colubrid Snake, Leptodeira discolor Günther

A Taxonomic Study of the Middle American Snake, Pituophis deppei

A Review of the Frogs of the Hyla bistincta Group

Descriptions of New Hylid Frogs From Mexico and Central America

The Genera of Phyllomedusine Frogs (Anura: Hylidae)

Descriptions of Two Species of Frogs, Genus Ptychohyla