226 THE ESSEX FIELD CLUB. Eight galvanized steel river boats were in course of building. They are adapted to carry indiarubber, ivory, and other light produce, and are paddled by the natives on the creeks and rivers in connection with the Congo to bring the produce down to the steamers running on the river. After being con- structed at Wivenhoe, these boats, of which Messrs. Forrestt and Son, have made hundreds in the last 10 years, are taken to pieces and carried on the heads of natives about 1,500 miles through the forest and then put together again. The tide, however, was falling, and interesting as the ship-building was, a hurried embarkation on board the "Pyefleet" became imperative. For fear that so large a party could not be accommodated on the dredging vessel, a smaller steamboat, the "Wyvern," had been hired from Messrs. Forrestt, but she was not much used during the day. The Police steam launch, under the command of the Chief Constable, Mr. R. O. Coombs, rendered valuable service as an auxiliary means of transport. Scarcely had those new to the Colne finished their expressions of admira- tion of the breezy estuary and its picturesque surroundings, than the sun came out and lighted up the distant hills with the mellow shades of autumn, and all fears of rain were finally dispelled. Having reached that part of the river which lies between the mouth of Brightlingsea Creek and Mersea, a dredge was thrown overboard and soon the deck was covered with oysters in almost every stage of growth, except maturity. As stated above the pro- gramme had furnished the spectators with a sketch of the natural history of the oyster, and so all could readily follow the practical demonstration of the conductors and the dredgermen members of the Colne Fishery Board. Owing to the constant cleansing of the beds, very few marine animals were obtained, but great interest was shown in the abundant specimens of two or three species of Ascidians and the curious "Pipe-weed" (Alcyonidium glomeratum). The vessel then steamed up the Pyefleet, a channel dividing Mersea from the mainland, where the oysters are relaid to fatten. At Pewit Island the whole party landed and inspected the pits in which the mature oysters are placed to keep until wanted. The dredgermen demonstrated the methods of trimming, cleaning, and packing the oysters for the market. i Then came luncheon in the Packing-house, which had been catered for in an admirable manner by Mr. J. G. Potter, of Colchester, who had brought the whole with tables and other furniture across in the police launch early in the day. It was a veritable "Oyster Feast" on a small scale, an abundant supply (1,300 !) having been supplied for the party. In the open, at an extemporised table of boards placed on oyster-barrels, the Ordinary Meeting (the 172nd) was held, Mr. David Howard, president, in the chair. The Right Hon. the Countess of Warwick and Mr. E. E. Turner were elected members. Dr. H. C. Sorby, F.R.S., read a paper entitled, "General Remarks on the Marine Natural History of the Colne Estuary" (ante, p. 166). Dr. Sorby exhibited specimens in illustration of his remarks, as well as lantern-slides of marine animals and algae, preserved by special methods, which he was