Friesia XI, 5

- 268-
Figure 3. A scosphaera atra. Spore cysts with attachment an la teral hyphae
and mycelial out g ro wth. a. spore cysts with attachment and hyphal outgrowth.
X 250. b. A spore cyst an aerial mycelium. SEM X 500. c. Hyphal
outg r owth (partly coUapsed in preparation) from the tube-shaped extension
af the sp ore cyst membrane. SEM X 2000.
The wall of the spore cyst consists of two distinct, t hin, translucent
membranes, the outher being hyaline and gelatinous, and the
inner being vitreous, brittie and black (Fig. 4) (cf., UDAGAWA &
HORIE 1974, who mentio ned the two membranes in the spore cysts
of Ascosphaera apis ( MASSE N ex CLAUSSEN) OLIVE et SPILTom). In
transmitted light, the wall is covered with sp ots that may be crystalloid
papillae (Fig. 5) (cf. e.g., GOCHNAUER & HUGHES 1976). This
F ig ur e 4. Ascosphaera atra. The two membranes af a spore cyst. X 600.