Mode of occurrence of the silicified corals, 351.—Their character and structure, 352.—Flints, nodules of Chalcedony, Agates, etc., 353.—Other siliceous concretions, 354.—Jasper, 355.—Deposits of Limonite, 356.—Magnetic Iron-sand, 357.—Suggested explanation of the silicification of the corals, 358.—Note on a silicified Tree-fern, 360
Previous observations, 361.—Magnetic Polarity usually caused by atmospheric electricity, 362.—Displayed by both acid and basic rocks, 364.—Very frequent in Vanua Levu, 365.—Its relation to specific weight, 366.—The influence of locality, 367.—Frequently observed in mountain peaks, 367.—Description of the peaks, 368.—Measurement of the polarity of rocks, 370
Vanua Levu, a composite island formed during a long period of emergence, 372.—The submarine plateau probably produced by basaltic flows, 373.—The distribution of the volcanic rocks, 374.—Comparison with Iceland, 374.—The mountain-ridges, 375.—The emergence of the Fiji Islands, 376.—Wichmann’s view of the early continental condition not supported, 376.—Age and character of the emergence, 377.—The evidence of the Lau Group and of the Tongan Islands, 378.—Two principal stages of the emergence, 379.—Relative antiquity of the Hawaiian, Fijian, and Tongan Islands as indicated by their floras, 379.—Islands have always been islands, 380.—The hypothesis of a Pacific continent not yet needed, 381.—The great dilemma, 381.—Much remains to be learned of the possibilities of means of dispersal in the past and in the present, 382
(1) Note on microscopical examination of stone-axes.
(2) Note on the ascent of the tide in the Ndreketi River.
Na Raro (2,420 feet) from the south-west, a peak of acid } andesite } } _Frontis- Ndrandramea (1,800 feet) from the south-east, a peak of } piece_ acid andesite rising about a thousand feet from its base }
The Ndrandramea District from the westward 98
Mount Tavia (2,210 feet) from Vatu Kaisia } } 108 The magnetic peak of Navuningumu (1,931 feet) from the south }
Mbenutha Cliffs, showing volcanic agglomerates overlying tuffs and clays, containing shells of pteropods and foraminifera, which are raised 1,100 feet above the sea 111
Duniua Lagoon, representing an old mouth of the Ndreke-ni-wai 153