Work found, with species-group names introduced therein:
Reeve, L. 1845d. Descriptions of new species of Mitra and Cardium. Proceedings of the Zoological Society of London 12 167-187. [Stated date: -- Dec 1844; true date: -- Feb 1845.] Mitra variata, see Vexillum variatum (Reeve, 1845)