| Date Note | Date of publication of original, date of last livraison. |
| Description | Tracing in pencil of the fossil fish Nemopteryx mandibularis Agassiz or Pygopterus scoticus Agassiz, taken from Sedgwick, Adam, "On the Geological Relations and internal Structure of the Magnesian Limestone, and the lower Portions of the New Red Sandstone Series in their Range through Nottinghamshire, Derbyshire, Yorkshire, and Durham, to the Southern Extremity of Northumberland", 'Transactions of the Geological Society of London', Series 2, Vol 3 (1829), pp37-124, plate XI.
Note: in Sedgwick's paper the species of fish is unidentified. |
| Administrative History | Collected as part of the research for Louis Agassiz's 'Recherches sur les Poissons Fossiles' (1833-1843) but never published. |
| CustodialHistory | From a folder marked 'Pygopterus/Acrolepis' |