2 THE MYCETOZOA : alpine situations close to the melting winter snows I remember seeing in Switzerland, high on the alps, the white sporangia of that hardy species Diderma niveum clustered on the slender stalk of a blue Soldanella flower which had just pierced through the snow. In this case, the ''plasmodium" (or feeding stage) of the Diderma must have been spent on turf underneath the snow-mantle in an almost freezing atmosphere. When we come to history, the very first published record that I know of any species of the Mycetozoa was made more than two hundred years ago by our illustrious fellow-countryman, John Ray (born 1627 ; died 1704). We Essex people may well be proud of the fact that so noble and distinguished a man was a native of our county. In the pages of the Essex Naturalist, Prof. Boulger and Mr. Miller Christy have given interesting accounts of the chief events of Ray's Life,1 and of his work, which forms a landmark in the history of both botany and zoology. The son of a village blacksmith, Ray became a Fellow of Trinity College, Cambridge, and eventually one of the most eminent naturalists of his day. His travels at home and abroad with his friend and fellow-worker, Willughby, his work on birds, beasts, fishes, and insects, as well as on plants, his patient endurance of ill-fortune and ill-health— neither of which damped his enthusiasm or industry—I must not dwell on here. What concerns my subject is that, in the second edition of his Synopsis of British Plants, published 1696, he describes2 a certain small scarlet fungus with a spherical head filled with yellow fluid, which had been found by his friend, Dr. Richardson. This brief description has been accepted by later writers as applying undoubtedly to the young stage of Lycogala epidendrum. All of us who have searched for Mycetozoa must have met with this species on some old log, looking when it first emerges from the wood like a group cf coral-coloured peas, from which, when injured, the orange- pink spore-material oozes out.3 1 See " Report of the Ray. Dale, and Allen Commemoraton Fund. 1912," by Miller Christy {Essex Naturalist, vol. xvii.. p. 129). and" A Eulogy of John Ray. Samuel Dale, and Benjamin Allen." by Prof. G. S. Boulger (loc. cit., p. 146). 2 Synopsis Methodica Stirpium Britannicarum, ed. 2. p. 339. 3 Since writing the above, I have found considerably earlier and unmistakable reference to one of the Mycetozoa in the Herbarium Portatile of Dr. Thomas Panckow, published in Berlin, 1654. In this herbal, the first of the numerous illustrations is entitled " Fungi cito crescentes " (fungi of rapid growth) and portrays several characteristic groups of aethalia of Lycogala epidendrum, the same species as that described by Ray : the title