DETAILED DESCRIPTION OF FRONTISPIECE.
I.—Badhamia foliicola Lister; group of sporangia on oak
leaf. This species was first recognized as a distinct
species from specimens obtained in Wanstead Park,
Essex, September 1896.
1a.—Sporangia, stalked and sessile, on grass.
1b.—Part of network of capillitium, and spores.
1c.-Spore, more highly magnified.
2.—Badhamia populina Lister ; group of sporangia, on poplar
bark. This species Was first found on a wood-pile in Wal-
thamstow, Essex, in June 1899.
2a.—Two clusters of spores.
2b.—Spores magnified, showing ridges on the walls where
dehiscence Would take place. .
3.—Comatricha fimbriata G. Lister and Cran ; group of sporan-
gia on piece of bramble stem ; from four the spores have
been shed. This species was first found in Wanstead Park,
Essex, in November 1913.
3a.—Sporangium from which the spores have been shed; the
base of the stalk shows a reticulated structure.
3b.—Capillitium and apex of stalk.
3c.—Spore showing a smooth patch where dehiscence would
occur.