| Description | Pencil sketch showing the scaled body, with scale details, of an unidentified fossil fish [?Eugnathus], by unknown artist, possibly Mr Thuiller of Blamont, July 1837. The drawing was clearly posted to Agassiz in Neuchatel, as it contains his address and is postmarked. |
| 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 'Ptycholepis, Gyrolepis and Eugnathus' |