| Date Note | Likely date span based on collection and publication date. |
| Description | Pencil and wash drawings of fin spines, with sections, of the fossil fish Myriacanthus paradoxus Agassiz, attributed to Charles Weber, but may be by Joseph Dinkel, [1834-1836]. Locality: Lias, Lyme Regis in the collection of the British Museum. |
| Administrative History | Although attribued by Agassiz to Charles Weber, there are no other drawings by him of the British Museum collection. All of the others are by Joseph Dinkel, therefore the attribution may be incorrect. |