Dredged in 100 ft., 32 mi. E. St. Augustine, St. Johns County, Florida by Ted Yocius in 1974 (1.85 mm.). Scanning electron micrographs performed under the auspices of the Dept. of Invertebrates of the United States National Museum with the excellent technical assistance of Ms. Yolanda Villacampa.

    Culled by H. G. Lee from 500 mL (2 cupfuls) unsieved grunge from within larger shells taken from a renourishment site on Phipps Ocean Park Beach, Palm Beach, Palm Beach Co., FL by Carole Marshall in April, 2021 (1.69 mm.). SEMs performed by Dr. Lee under the supervision of Dr. Ann Heatherington, Dept. Geology, University of Florida, Gainesville, FL.

    Culled by H. G. Lee from 300 mL grunge sample taken at the base of ledge at 80 ft. ~ 1.5 miles E Jupiter Inlet by Rick Edwards! July 4, 2021 (1..60 mm.). SEM performed by H. G. Lee in collaboration with Dr. Ann Heatherington, Dept. of Geological Sciences, University of Florida, Gainesville, FL.