181 XV. A Preliminary List of the Hymenomycetal Fungi of Epping Forest ; A Contribution to the Botany of the County. By M. C. Cooke, M.A., LL.D., A.L.S., &c., and James L. English. [Read November 26th and December 17th, 1881.] [This list of the Fungi of the family Hymenomycetes, occurring within the Forest Districts, is intended only as a prodromus of the more extended and exhaustive catalogue to which we may look forward as the result of the persevering labours of our botanical members and others. It enumerates all the species of the family (338 in number) yet identified with certainty as growing within the prescribed district, which lies on both sides of the line separating Provinces I. and II. of Professor Boulger's sketch-map of the County (Plate VI.). The list has been compiled by Dr. Cooke [" C."] from his notes of personal visits to the Forest, and from materials furnished as the result of many years' observation by Mr. English, of Epping ["E."], with the addition of a few species noted by Mr. Worthington G. Smith. The indication of precise localities is purposely avoided, as being almost useless ; fungi are very capricious and evanescent in their places of growth, slight local changes often resulting in the appearance of species in new stations, or in the destruction of old and well-known habitats. The word "Epping" ap- pended to Mr. English's records must be taken with rather a wide interpretation : it includes the woods near the town of that name, with Monk Woods, Theydon Woods, &c.,—in short, the northern section of Epping Forest. The list will doubtless be considerably extended as the Cryptogamic flora of Essex is more thoroughly investigated; but it is thought best to print it as it stands, to serve as an indication of the riches of the Forest, and as a guide to