| Selected Western Atlantic Caecum |
| Caecum imbricatum Carpenter, 1858 Imbricate Caecum |
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| In shell grit taken by SCUBA from a depth of 69 feet off Boynton Beach, FL (2.8 mm.). Digital image by David Kirsh. |
| Caecum infimum de Folin, 1867 |
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| From grit collected at a depth of 69 feet off Boynton Beach, Florida (about 1.3-1.5 mm.). Digital images by David Kirsh. |
| Caecum multicostatum de Folin, 1867 Fine-line Caecum |
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| From tidepool, Kiawah Island, Charleston County, South Carolina (2 mm.). Digital images by David Kirsh. |
| Caecum plicatum Carpenter, 1858 Plicate Caecum |
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| 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 |
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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. |
| Caecum pulchellum Stimpson, 1851 Beautiful Caecum |
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| In shell grit taken by SCUBA from a depth of 69 feet off Boynton Beach, FL. Digital image by David Kirsh |
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Shell grit, Bear Island (Hammocks Beach State Park) near Swansboro, North Carolina. Digital image by David Kirsh |
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