Date Note | Known activity of artist based on other dated drawings |
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' |