198 PREHISTORIC INTERMENT NEAR WALTON-ON-NAZE. Mr. Holmes says of the Algae obtained :—"All are common species, such as are found at mouths of rivers, near the sea. The Enteromorphas are found where the water is less salt, usually where a fresh water stream runs into the salt water. Cladophora rupestris, Rhodomela subfusca and Polyides rotundus more frequently occur in pools by the open sea, but may have been washed ashore or torn up by the tide in sea water." Reports of previous dredging excursions in the estuaries of the Orwell and Stour were published in the Essex Naturalist, vol. v. (1890), pp. 169-173, and vol. v. (1891), pp. 241-247. ON A PREHISTORIC INTERMENT NEAR WALTON-ON-NAZE. BY S. HAZZLEDINE WARREN, F.G.S. [Read January 28th 1911.] With Plate xiv. THE excursion of the Essex Field Club to Walton-on-Naze on 17th September 1910, resulted indirectly in a dis- covery of some importance. Two members of the party, namely Mr. Miller Christy and myself, took the opportunity to stay in the neighbourhood over the week-end. On the afternoon of the day following the excursion, we together undertook a subsidiary investigation of the mud-flats bordering the estuary of the Hamford Water. I have visited these mud-flats very frequently, and I consider it a coincidence of extraordinary good fortune, that I should have had Mr. Miller Christy for my companion on the one occasion upon which I made the most important discovery which has yet been made in that district. It was fortunate not only on account of the practical help which he gave in dealing with difficulties which I could not successfully have overcome alone, but also on account of the valuable confirmation which he is able to give in respect of the circumstances under which the discovery was made. In previous communications to this society I have given some account of the general character and Stratigraphical succession of the marsh deposits of this district. As we proceeded along the line of outcrop of the marsh clay under- lying the Buried Prehistoric Surface, as described in those papers, I noticed the ends of two bones, standing obliquely out of the clay. I at once called my friend to the spot, as the bones looked to me extremely like the distal extremities of a human tibia and fibula, side by side in their natural position. Upon probing into the clay by the side of these