M 1337 Gryphaea vesicularis.
| 分類 | Animals: Mollusca: Mollusca Proper: Conchifera: |
| 年代 | Mesozoic Cretaceous Upper Cretaceous: Danien: |
| 産地 | Northert, kent. |
| 文献 | Department of Science, Tokio-Daigaku, 1881: Cretaceous formation. Catalogue of Histrical Geology. Mesozoic., pp. 1–26. Department of Science, Tokio-Daigaku. |
