M 44 Natica gregaria.
| 分類 | Animals: Mollusca: Mollusca Proper: Gasteropoda: |
| 年代 | Mesozoic Triassic Lower Trias: Muschelkalk: |
| 産地 | Erkerode near Branschweig |
| 文献 | Department of Science, Tokio-Daigaku, 1881: Triassic formation. Catalogue of Histrical Geology. Mesozoic., pp. 1–10. Department of Science, Tokio-Daigaku. |
