Lyell,* “Principles of Geology,” 10th ed., 1868, vol. 2, p. 82. affected both sides of Cook Strait. It was, however, a tilt to the west, which depressed the western shore of the strait and elevated the Wellington side as a whole—that is, the area shown in fig. 1—by an amount varying from zero on the north-west to about 9 ft. on the south-east. The raised beaches of the Wellington coast which owe their elevation to that movement have been described and figured by Bell.† Trans. N.Z. Inst., vol. 42, 1910, p. 538, and pl. 41 and 42. They may be seen also in Plate XVIII, fig. 2, and Plate XXI, fig. 2. Both views are of parts of the eastern shore of Miramar Peninsula. There is some evidence that this tilt is a continuation of an earlier tilting movement in the same direction, the axis of the movement lying a little to the west of Wellington. On the south-east a series of very fresh raised gravel beaches at Cape Turakirae, the highest being 90 ft. above the sea. are mentioned by Aston.‡ B. C. Aston, this volume, p. 208. On the north-west there appears to have been a downward movement of small amount subse-quently to the general movement of elevation the proofs of which have been given. This movement, which has drowned the lower reach of the Porirua Stream, does not appear to have been more than 30 ft. or 40 ft. The stream had previously developed a broad strip of flood-plain, and this has been drowned to a distance of about a mile and a half from the sea. At Porirua there appears to have been little or no movement either up or down in 1855. Raised rock platforms similar to those at Wellington are not found. This agrees with the accounts of eye-witnesses given in substance by Lyell.§ Loc. cit. Fig. 9.—The Scarp Of The Wellington Fault As Seen From Kelburne. The mouth of the Kawarra is a little to the left of the centre, and the mouth of the Ngahauraga is on the right. The Wellington Fault. The Fault-scarp. The following account may serve to supplement the “proof of the great fault along the western side of Wellington Harbour” given by Bell.∥ Loc. cit., p. 539. In fig. 1 the line of faulting is indicated as “Wellington fault” (see also fig. 9, a sketch of the fault-scarp as seen from Kelburae, and Plate XIX, fig. 2, a photograph from Petone). For the length of this line, about six miles, the Port Nicholson depression is bounded by an abrupt scarp with a base-line almost perfectly straight, the departure from perfect alignment consisting of two very gentle curves, concave towards the shore, separated by a similar convex curve of very