Crouch, E.A. 1827. An Illustrated Introduction to Lamarck’s Conchology, Contained in his Histoire Naturelle des Animaux san Vertebres, etc.: 22 pls. https://www.biodiversitylibrary.org/page/51108230#page/7/mode/1up.
(misidentified reference to Unio brevialis Lamarck, 1819)
‘Lamarck’ Crouch, 1827. Illustr. Lamarck’s Conch.: 16, pl. 9, fig. 3.