Since the publication of my paper, entitled “Notes on the Genus Phaneropleuron, with a Description of a New Species from the Carboniferous Formation,” in the Geological Magazine for December, 1871, pp. 529–535, Sir Philip Egerton has kindly sent me for comparison a specimen in his collection of the Burdiehouse fish, named by Agassiz Uronemus lobatus, at the same time directing my attention to the resemblance which it bore to the fish which in the paper referred to I had described and figured as Phaneropleuron elegans. I am also indebted to the Earl of Enniskillen for an opportunity of examining another specimen of the same fish.