Nerodia cyclopion and N. floridana 
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floridana (open circles) in southern Alabama and western Florida. The 
inset map shows localities of specimens examined in this study (most 
circles represent more than one specimen). 
Dauphin Island, Alabama. This lightened coloration may be a result 
of selective pressures present in a coastal environment rather than 
an indication of gene exchange between cyclopion and floridana. 
On the basis of scale characters, these individuals are all clearly 
identifiable as cyclopion. 
Mount (1975) also mentions specimens of floridana taken along 
the eastern shore of Mobile Bay. These specimens (LSUMZ 15780, 
Alabama: Baldwin County, Mobile Bay 3.95 miles west of Spanish 
Fort; Auburn University Museum 3030, Alabama: Baldwin County, 
west of Fairhope) are classified as cyclopion by body and head 
scale analysis, but both are nearly amelanistic, with extremely light 
ventral and dorsal color patterns. One of these (AUM 3030) has 
