Lower Pinecrest beds, Upper Tamiami Formation, Sarasota County, Florida (top 1.62 mm. and middle 1.50 mm.). SEMs produced in collaboration with Dr. Ann Heatherington, Dept. Geological Sciences, University of Florida, Gainesville, FL.

    Cochran Pit, Caloosahatchee Formation, LaBelle, Hendry County, Florida (2.00 mm.). SEMs produced by H. G. Lee in collaboration with Dr. Ann Heatherington, Dept. Geological Sciences, University of Florida, Gainesville, FL.