The distribution of the mammals of middle America with special reference to geographic and climatic features

This thesis is the result of a study to determine the importance of geographic and climatic features in the distribution of the mammals of Middle America. Middle America is here defined as Mexico and Central America including the islands that belong to the countries studied. All the Recent mammals with the exception of the order Chiroptera are included in the study. The Chiroptera, or bats, are excluded because, since they alone of all the mammals can fly, geographic and climatic features are not such important ecological barriers to their distribution. Scientific names used in this study are based on Miller and Kellogg (1955). With a few exceptions specific rather than subspecific names are used.