There are in the collections shown in the MediÆval Room of the British Museum several fine specimens of shell Cameos which date from mediÆval times, but these shells were found in the Mediterranean; and at South Kensington there are a few specimens of shell Cameos worked in Rome. The only illustrations of the art of progressive working in the Conch-shell in any museum in London are to be seen in the South Court of South Kensington, where the portrait of Millais is shown in the several stages of progress, together with the shell from which the piece worked was originally cut. These interesting specimens were presented by Mr. James Ronca, who was a pupil of Pistrucci’s brother. There are, of course, many separate specimens of carved Conch-shells, in whole and in pieces, at both the British and South Kensington Museums.