| Date Note | Based on dated drawings by artist of this collection |
| Administrative History | Collected/drawn as part of the research for Louis Agassiz's 'Recherches sur les Poissons Fossiles' (1833-1843/1844). |
| CustodialHistory | From a folder marked 'Psammodus, Helodus, Strophodus, Ctenoptychius, Petalodus' |