I. Supplementary note on Polacanthus Foxii , describing the dorsal and some parts of the endoskeleton imperfectly known in 1881

The author describes the large dorsal shield, which has been recently restored and now exhibits the grouping of the keeled and tuberculated fragments, which in their disconnected and scattered condition had formerly been regarded as portions of separate scutes. This unique specimen shows Polacanthus to have possessed a more complete dermal armature than any other Dinosaur yet described.