238 THE ESSEX FIELD CLUB. Mrs. Thompson had placed the specimen in the Club's Herbarium. [See ante p. 122.] Mr. T. W. Reader exhibited photographs taken on various excursions of the Club during the present year, and he reported on recent additions to the Club's Library. Mr. H. Whitehead read a "Report on the Marine Organisms dredged from the estuaries of the Orwell and Stour on the occasion of the Club's Dredging Expedition in July last," the specimens forming a special exhibi- tion at the Meeting. Mr. Whitehead illustrated some of the forms of Pycnogonids found, by means of lantern photographs, and added an interesting verbal account of the various specimens on exhibition. [The paper is printed ante pp. 193-198]. The President suggested that the employment of a minute quantity of peroxide of hydrogen would restore the colouring lost by the immersion of the specimens in formalin. And he thanked Mr. Whitehead, in the name of the Meeting, for his Report, and for the excellent manner in which he had preserved, and exhibited, the specimens. Mr. C. Nicholson then read a paper :—" Notes in the Alien and Casual Plants of Essex," and illustrated his remarks by numerous herbarium specimens of the plants mentioned, most of them being from the Hale End and Woodford district, but others, exhibited in illustration of Essex records, being from various parts of the country. The Reverend A. C. Morris followed with a paper on a cognate subject : —"Notes on the Recent Occurrence of Certain Plants in Wanstead Park." and exhibited dried specimens of the plants referred to. Both these papers are printed in the present part of this journal. A discussion followed the reading of these two communications, in which the President, Messrs. Shenstone, Paulson, Dalton, Thompson, and the authors took part. The President said that, without oxygen, seeds cannot germinate, and they may exist for many years inert in the absence of oxygen ; water need not have any deleterious effect upon them. He thought it probable that Lucerne might have been sown on railway banks as helping, from its deep roots, to bind together the earth, and hence its appearance as a "casual" in such spots. The President proposed that the thanks of the Meeting should be accorded to Messrs. Nicholson and Morris for their interesting communications: AN AUTUMN MOSS AND LICHEN FORAY. Saturday, 12th November 1910. This meeting was held at Theydon Bois, some members of the Selborne Society being also present by invitation. The Referees were : For the Mosses and Hepatics, Mr. E. M. Holmes, F.L.S., and for the Lichens, Miss Lorrain Smith, of the British Museum of Natural History, and Mr. Robert Paulson, F.R.M.S. The meeting was an all-day one, and comprised a morning and an afternoon party. The morning party assembled at Theydon Bois Station at 11 a.m., and proceeded through the village to Oak Hill and thence through the