ELLICE GROUP.—_Oscar, Peyster_, and _Ellice_ Islands are figured in Arrowsmith’s “Chart of the Pacific” (corrected to 1832) as atolls, and are said to be very low; blue.—_Nederlandisch_ Island. I am greatly indebted to the kindness of Admiral Krusenstern, for sending me the original documents concerning this island. From the plans given by Captains Eeg and Khremtshenko, and from the detailed account given by the former, it appears that it is a narrow coral-island, about two miles long, containing a small lagoon. The sea is very deep close to the shore, which is fronted by sharp coral-rocks. Captain Eeg compares the lagoon with that of other coral-islands; and he distinctly says, the land is “very low.” I have therefore coloured it blue. Admiral Krusenstern (“Memoir on the Pacific,” Append., 1835) states that its shores are eighty feet high; this probably arose from the height of the cocoa-nut trees, with which it is covered, being mistaken for land.—_Gran Cocal_ is said in Krusenstern’s “Memoir,” to be low, and to be surrounded by a reef; it is small, and therefore probably once contained a lagoon; uncoloured.—_St. Augustin._ From a chart and view of it, given in the “Atlas of the _Coquille’s_ Voyage,” it appears to be a small atoll, with its lagoon partly filled up; coloured blue. GILBERT GROUP.—The chart of this group, given in the “Atlas of the _Coquille’s_ Voyage,” at once shows that it is composed of ten well characterised atolls. In D’Urville and Lottin’s chart, _Sydenham_ is written with a capital letter, signifying that it is high; but this certainly is not the case, for it is a perfectly characterised atoll, and a sketch, showing how low it is, is given in the “_Coquille’s_ Atlas.” Some narrow strip-like reefs project from the southern side of _Drummond_ atoll, and render it irregular. The southern island of the group is called _Chase_ (in some charts, _ Rotches_); of this I can find no account, but Mr. F. D. Bennett discovered (_Geograph. Journ._, vol. vii, p. 229), a low extensive island in nearly the same latitude, about three degrees westward of the longitude assigned to Rotches, but very probably it is the same island. Mr. Bennett informs me that the man at the masthead reported an appearance of lagoon-water in the centre; and, therefore, considering its position, I have coloured it blue.—_Pitt_ Island, at the extreme northern point of the group, is left uncoloured, as its exact position and nature is not known.—_Byron_ Island, which lies a little to the eastward, does not appear to have been visited since Commodore Byron’s voyage, and it was then seen only from a distance of eighteen miles; it is said to be low; uncoloured. _Ocean, Pleasant_, and _Atlantic_ Islands all lie considerably to the west of the Gilbert group: I have been unable to find any distinct account of them. Ocean Island is written with small letters in the French chart, but in Krusenstern’s “Memoir” it is said to be high.