nts by man, 626.
----, on centres of vegetable creation, 703.

Wilkinson, Sir J. G., on deposits of Nile, 262.
----, on sand drift in Egypt, 726.

Wilson, Prof., on cosmogony of Vedas, 4.

Winds, trade, 106, 295.
----, currents caused by the, 293.
----, sand drifted by the, 307, 726.

Wolf, and dog, distinct species, 585.
----, hybrids between the, 601.
----, drifted to sea on ice, 640.
----, extirpated in Great Britain, 683.

Wollaston, Dr., on water of Mediterranean, 334.

Wood, Mr. S., on fossil quadrumana, 144.

Wood impregnated with salt water when sunk to great depths, 743.
----, drift, 90, 268, 640, 743.
----, converted into lignite, 759.

Woodward, theory of, 31, 84, 54, 66.

Wrecks, number of, annually, 754, 755.

X.

Xanthus, the Lydian, his theory, 14.

Y.

Yak, wild ox of Thibet, frozen in ice, 85.

Yakutzt, frozen soil of, 84.

Yaou, flood of, 7.

Yarmouth, estuary silted up at, 307.
----, rise of the tide at, 291, 307.

Yenesei, R., fossils on banks of, 79.

Yorkshire, bones of mammoth in, 76.
----, waste of its coasts, 303.

Young, Dr., on effects of compression at earth's centre, 536.

Z.

Zante, earthquakes in island of, 474.

Zealand, New, number of ferns, 116.
----, resemblance of plants with ancient carboniferous flora, 116.
----, length and breadth of, 116.

Zeuglodon, eocene cetacea, 145.

Zoological provinces how formed, 666.
----, why not more blended together, 668.

Zoophytes, their geographical distribution, 651.
----, their powers of diffusion, 654.
----, abundance of, 706.
----, which form coral reefs, 776.

Zuyder Zee, formation, 328.
----, great mosses on the site of, 327.

* * * * *

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