Abstract
A note on, and illustrations of, Perisphinctes listeri (de Haan) 1825, and Titanites cingulatus (de Haan) 1825, the original descriptions of which are in a Dutch publication.
W. J. Arkell; Two early-named valid species of English upper Jurassic ammonites. Geological Magazine 1950;; 87 (4): 265–266. doi:
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A note on, and illustrations of, Perisphinctes listeri (de Haan) 1825, and Titanites cingulatus (de Haan) 1825, the original descriptions of which are in a Dutch publication.