Below the Barton Coastguard Station rises another bed of green clay, containing sharks’ teeth and the bones of fish. About a mile farther on, the High Cliff Beds emerge rich with _Cassis ambigua_ and _Cassidaria nodosa_. And below them, seen in the channel of the stream flowing through Chewton Bunny, rises a bed of bright metallic-looking, green clay, the _Nummulina Prestwichiana_ Bed of Mr. Fisher, containing sharks’ teeth and some few shells. Beyond, a little to the west of High Cliff Castle, occurs the well-marked Pebble Bed, the commencement of the Bracklesham Series, containing rolled chalk flints, and casts of shells. Next follow grey sands full of fossil wood and vegetable matter, marked by a course of oxydized ironstone-septaria. Then succeeds another Pebble Bed, and lastly appear the grey Bracklesham Sands.[273] We have thus gone through the principal beds, both of the Freshwater and Marine Series, as far as they are exposed in this section along the sea-coast. The fluvio-marine beds stretch away eastward as far as Beaulieu and Hythe, but their clays here contain very few shells. On the other hand, the Bracklesham Beds trend away northward towards Stoney-Cross, appearing in the valley, and cropping out again on the other side of the Southampton Water. Some few words must be said about them. The highest beds, known as the Hunting Bridge Beds, occur in Copse St. Leonards, not far from the Fritham Road.[274] In a descending order, separated by thirty or forty feet of unfossiliferous clays, come the Shepherd’s Gutter Beds, to be found about half a mile lower down the King’s Gairn Brook; and below them, again, separated by forty or fifty feet of unfossiliferous clays, and situated somewhat more than a mile lower down the same stream, rise the Brook Beds. Still farther down, too, from some shells very lately discovered at Cadenham, it is supposed that the _Cerithium_ Bed of Stubbington and Bracklesham Bay will be found, but this is not yet ascertained. The Hunting Bridge Beds I have never examined, but subjoin their measurements, as also their most typical shells,[275] and must here content myself to give a general description of the Shepherd’s Gutter and Brook Beds. The former, the equivalent to the _Nummulina_ Bed at Stubbington, Bracklesham, and White-Cliff Bay, is so called from a small stream at the foot of Bramble Hill Wood, about a mile due north of the King’s Gairn Brook. The measurements are as follows:—(1) Gravel from one to five feet; (2) light-coloured clay, with a few fossils sparingly distributed, five to six feet; (3) _Turritella carinifera_ bed, one foot and a half; (4) fossil bed, characterized by _Conus deperditus_, and the abundance of _Pecten corneus_ within a few inches of the bottom, one foot and a half. [Illustration: Shells from the Shepherd’s Gutter Beds.]