90 THE JOURNAL OF BOTANY 



typical clusters of sporangia from Mr. Forrest, who had collected 

 them in Antigua in the course of the autumn. 



Margarita metallica List. Miss M. Roberts gathered this spe- 

 cies in November, 1900, in Carnarvonshire ; it is the first time we 

 have received it from Wales. The sporangia are iridescent with a 

 coppery lustre ; the flowing capillitium is more evidently branched 

 than is often the case, and the attachments to the sporangium-wall 

 are more distinct. 



Dianema corticatum List. Since the winter of 1898, when 

 Mr. Cran first discovered D. corti.catam near his residence in 

 Aberdeenshire (Journ. Bot. 1899, 152), he has continued to find it 

 at intervals on dead wood; I have just received from him a fine 

 specimen, gathered in December, 1900: the capillitium is perhaps 

 more abundant than usual, but the spiral markings on the slender 

 threads can only be made out by careful search ; otherwise all his 

 gatherings correspond exactly with the original type from Norway. 



Prototriohia flagellifera Rost. We had no record of this 

 species having been found in Scotland until November, 1890, when 

 we received a specimen from Mr. Cran, gathered by him near 

 Rhynie ; it is the sessile form with faint spirals on the capillitium- 

 threads, similar to many of our Lyme Regis examples. 



Lycogala flavo-fuscum Rost. In Journ. Bot. 1897, 217, I re- 

 ferred to an sethalium of L. Jhiro-fuscnm which Mr. Crouch had 

 kept under observation in Bedfordshire since 1895, from the time 

 that the white plasmodium emerged from a decaying elm to its 

 reaching maturity. Two years later — in September, 1897 — another 

 SBthalium appeared, and io October, 1899, a third came up within a 

 few inches from the spot where the last had been found ; the elm 

 tree was near Mr. Crouch's residence, and constantly under notice. 

 It is interesting to note that an interval of two years elapsed between 

 the several growths of this apparently rare species. 



Description of Plate 419. 



1. Ghondrioderma simplex Schroet. :— a. Group of sporangia, X 20. b. Ca- 

 pillitium, attached above and below to the sporangium-wall, x 280. c. Spores, 



X 280. D. Spore, x 600. 



2. Badhamia versicolor List. : — a. Sporangia on lichen, x 20. b. Capil- 

 litium attached to a fragment of the sporangium-wall, x 280. c. Two clusters 

 of spores, 280. d. A broken cluster and an isolated spore, x 280. e. Three 

 spores, X 600. 



3. Lepidoderma tigrimim Eost. :— a. Sporangia of Ghondrioderma form, x 20 

 (Merionethshire), b. Sporangium showing lime, partly in vitreous discs, partly 

 forming a calcareous crust, x 20 (from Dr. W. C. Sturgis, Shelburne, N.H.). 

 c. Sporangia with stellate scales, x 20 (from Mr. Fries, Upsala). 



