1. The coral-rock commences nearly everywhere with a basal bed of varying thickness containing a fauna of pre-Pleistocene aspect among which the genus Haliotis (absent from these coasts at the present day), Pleurotomaria, Meiocardia, etc., are noticeable. This faunule may have lived at a depth of 700–1,000 feet.

2. The supposition that the southerly anticlines are a later uplift than the main portion of Barbados is supported by the absence of ravines, and the presence of post-coral-rock beds which occur as coastal veneers at low altitudes, and in greater thickness in the south-east corner near Whitehaven.

3. The south-east part of the island from Consett Point to Ragged Point has probably extended further seawards in comparatively recent times ; the series of converging faults and dislocations in the cliff sections suggest that the thrusts from the west or south-west may have been resisted by this part of the island.

4. The relative claims of fault-scarping or marine erosion in production of the rising terraces is discussed ; and new information regarding the thickness of the coral-rock at sea-level from a boring is detailed.

5. The finding of a faunule with Pliocene or possibly Miocene affinities at the base of the coral-rock puts the Oceanic series further back, into the Miocene.

A Number of small pegmatitic patches occur in the development of the later stages of the hornblende hybrids of the Cairnsmore of Carsphairn Complex. These are best seen on the eastern side of the Gairy of Cairnsmore, and it is within these pockets of late residuum crystallization that this hornblende occurs. The pegmatites consist of milky quartz, greenish-black hornblende and a clove coloured sphene. The two latter minerals develop idiomorphic crystals. The hornblende, though usually only 1½ inch in length, occasionally grows to 1½ inches long in slender prismatic crystals showing the faces (100), (110), (110), (130), (130), (010), (011), and (011).

The marginal rocks of this intrusion were described briefly in a paper dealing with the Cairnsmore complex. The intrusion is composite, consisting of a central granite, and successive zones of acid hybrid, tonalite, and basic hybrid. The complex began with the intrusion of gabbro, and when crystallized, but still ata high temperature, it was followed by the tonalite with the production of the basic hybrids. The original basic intrusion is nowhere found in an unaltered condition but is now represented by the “dioritic” lenses. It is seen then that the outermost zone of the intrusion uncontaminated by the incorporation of the sedimentary country rocks is itself a hybrid resulting from the intrusion of tonalite in the original gabbro. In the earlier paper it was suggested that the character of these marginal rocks was due to the combined effects of sedimentary contamination and igneous hybridization.

The well known Lulworth Cove, situated on the Dorsetshire coast between Mupe Bay, on the east, and Dungy Head, on the west, is generally considered to be a very good example of the result of marine erosion acting upon rocks of unequal resistance, and such indeed it is.