MYCETOZOA IN EPPING FOREST 191 Bristowe, W. S. 1949. The Distribution of Harvestmen (Phalangida) in Great Britain and Ireland, with notes on their names, enemies and food. J. Anim. Ecol. 18 : 1, p. 100. Brown, D. G. and Sankey, J. H. P. 1950. The Harvest-spider Nelima silvatica (Simon) in Great Britain. Proc. zool. Soc. Lond., 119 : 4, p. 867. Graaf, H. W. de. 1882. Over den Bouw der Geslachtsorganen bij de Phalang- iden. Leiden : Brill. Gueutal, J. 1944. La ponte chez un Opilion : Phalangium opilio Linne. Rev. franc Entom. Paris 11 : 1, p. 6. ------------. 1944a. De l'eclosion chez un Opilion : Phalangium opilio L. Bull. Soc. ent. Fr. 49 : 2, p. 24. Hansen, H. J. and Sorensen, D. 1904. On two orders of Arachnida. Cambridge : University Press. M'Indoo, N. E. 1911. The lyriform organs and tactile hairs of Araneads. Proc. Acad. Nat. Sci. Philad. 63 : p. 375. Roewer, C. F. 1923. Die Weberknechte der Erde. Jena : Fischer. Sankey, J. H. P. 1949. On the Harvestman, Opilio saxatilis (C. L. Koch). Proc. zool. Soc. Lond. 119 : p. 297. ------------. 1949a. Observations on food, enemies, and parasites of British Harvest-spiders (Arachnida, Opiliones). Ent. mon. Mag. 85 : p. 246. Simon, E. 1879. Les Arachnides de France 7 : p. 203. Thompson, J. L. Cloudsley. 1949. Notes on Arachnida. 10. Ent. mon. Mag. 85 : p. 261. Todd, V. 1948. Key to the determination of the British harvestmen (Arachnida, Opiliones). Ent. mon. Mag. 84 : p. 109. Council for the Promotion of Field Studies, Juniper Hall Field Centre, Dorking, Surrey. Note.—The following living species were exhibited : M. morio, O. agrestis, T. tricarinatus, A. cambridgei, and 7Y. lugubre. MYCETOZOA IN EPPING FOREST IN 1948-49 BY J. ROSS AN exceptionally good start was made in recording Mycetozoa in the twelve months from March 1st, 1948, to February 28th, 1949, but subsequently the period was somewhat disappoint- ing as a consequence of adverse weather. In January 1948 the rainfall was 4.05 inches, and helped by a snowfall in February provided splendid hunting in March. In that month thirty species were found, of which twenty-one were in such condition as to warrant their inclusion in the 1948-49 list. In the five months March to July, both inclusive, the rainfall was only 7.02 inches, but August with 3.07 inches brought improvement, the total number of species recorded in that month being forty- three, followed by fifty in September and thirty-eight in October. The rainfall of 23.23 inches for 1948 was below the average. Of the twenty-one species entered in the list for March ten