482 THE SOOTY MOULD OF CITRUS TREES, 



Antennaria-forins. — These were associated with the glomeruli, 

 and seemed to be the most plentiful of all. They were imbedded 

 in clusters among the hypha^ and emitted the colourless spores in 

 great abundance, which remained in masses around the irregularly 

 opening mouth. 



No pycnidia were met with, although carefully looked for on 

 a large number of leaves. 



Perithecia. — Only immature forms were found of various sizes 

 and at different stages of development. The only one figured 

 (fig. 21) was of fair size (150 x 112 ^) dark coloured and oval in 

 shape. On pressure the net-like areas of the wall were very 

 distinct, and by transmitted light were either sea-green to sage- 

 green or brownish. It contained numerous oil-globules and a 

 few asci with paraphyses. The immature asci were shorter and 

 narrower than the average (39 x 9| /x) and showed finely granular 

 colourless contents within an inner envelope, and there was a 

 small oval spot towards the centre. In some cases division of the 

 contents had begun, and probably there were some mature forms 

 of perithecia, but I did not happen to come across them (figs, 

 13-21). 



Kew Specimens. — The specimens from Kew did not show a ery 

 advanced stages. There were colourless to pale green hypha;, 

 bearing their unicellular or bicellular or simple gonidia, together 

 with Torula-like chains and the quadrate gemmae. The origin 

 of these latter bodies was very clearly seen. A single cell might 

 germinate and produce hyphae in one or more directions, or it 

 might divide into two and ultimately into four, each cell giving 

 rise to a filament, but usually one stopped short, so that there 

 were three radiating filaments. 



There were also greenish-brown to brown hyphse with their 

 gonidia and gemmae and detached joints. Sometimes the coloured 

 hyphse passed into colourless portions. The glomeruli and spores 

 were also met with, and these, together with the quadrate gemmae 

 were very characteristic (figs. 22-25). 



Burnley Specimens. — The specimens from the Royal Horticul- 

 tural Gardens, about three miles from Melbourne, showed the 



