Roger C. Cogan

This list incorporates changes in taxonomy and nomenclature that have occurred since the last list was prepared. Additional species have been documented and added to the list.

This is a summary of personal observations and impressions of the continued presence or absence of the herpetofauna which have been previously reported at the Appleton-Whittell Research Ranch. A total of fifty-two amphibian and reptile species have been reported within the Research Ranch boundaries. The continued existence of several species may be in doubt.