In the former part of this paper, I remarked that the Coralline Crag had, during its latter stages, been subject to a process of slow elevation, but probably without rising above the sea-level. It had, however, emerged above the sea at the commencement of the Red-Crag period, as evinced by the shore-line at the base of the Red Crag at Sutton (see Pl. VI.), when the Coralline-Crag reef or islet stood some 40 feet or more above that shore-line. The difference of level between the lower shore-line and the surface of the London Clay under the Red Crag in the adjacent district is not more than a few feet, whence the Red Crag must have been accumulated in a shallow sea. Mr. Searles Wood, Jun., considers that the lower division of the Red Crag is arranged in successive beach-stages. There seems to me, on the contrary, to be an absence of definite order; and the lamination and bedding which he considers referable to beach-action, I think may in all cases be referred to the variable bedding and oblique lamination produced by the shifting of shoals and sand-banks at the bottom of the Red-Crag sea, as was the case with the upper division of the Coralline Crag (ante, fig. 3, p. 120). Mr. Wood, Sen., has already expressed his opinion that the peculiar stratification of the Red Crag must b e owing to the constant shifting of the sands and shingle caused by variable and changing currents ; and this