|Caecum plicatum Carpenter, 1858 Plicate Caecum|
|Beach drift, "Xeno Beach," Eleuthera, Bahamas (all three specimens are about 3 mm.).| Digital images by David Kirsh.|
|Scanning Electron Micrograph (SEM) Of Fossil Specimen|
Lower Pinecrest beds, Upper Tamiami Formation, Sarasota County, Florida. SEM produced in collaboration with Dr. Ann Heatherington, Dept. Geological Sciences, University of Florida, Gainesville, FL.