XLII.—On the unity of the genera Pleuracanthus, Diplodus and Xenacanthus, and on the specific distinction of the Permian fossil Xenacanthus Decheni (Beyrich)

Philip De Malpas Grey Egerton

Published in Annals And Magazine of Natural History, in 1857, in volume 20, pages 423-424

Date published:1857

DOI: 10.1080/00222935709487949
BHL: 2365531
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