INTRODUCTION
Acknowledgments
Field Studies in the Isthmus of Tehuantepec
Sources of Material
DESCRIPTION OF THE ISTHMUS OF TEHUANTEPEC
Physiography
Climate
Vegetation
The Sierra de los Tuxtlas
GAZETTEER
Oaxaca
Veracruz
THE AMPHIBIAN FAUNA OF THE LOWLANDS
Composition of the Fauna
Ecology of the Fauna
Distribution of the Fauna
THE AMPHIBIAN FAUNA OF THE FOOTHILLS AND ADJACENT HIGHLANDS
ESTABLISHMENT OF PRESENT PATTERNS OF DISTRIBUTION
ACCOUNTS OF SPECIES
SUMMARY
LITERATURE CITED
UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY
