97 
The green portion of the leaf affected is entirely used up, leav¬ 
ing the fibro-vascular bundles intact, covered by the upper and 
under grey membranaceous .epidermis. 
Closely associated with the perithecia was a species of Clado- 
sporium , with short, pale-green, almost colourless, scanty liyphae, 
2 /lx., broad and apical eonidia, similarly coloured, or olivaceous, 
smooth, elliptical, 1-septate, constricted usually at septa, 
11-16 X 5-8//. (Figs. 88, 84, So, 86.) 
47. CITRUS CONIOTHYRIUM. 
Coniothyrium citrlcolum , n. sp. 
Minute, black, punetiform pustules on greyish white, dry spot 
of leaf, surrounded by raised ruddy-brown margin. Perithecia 
loosely gregarious, immersed, dark-brown by transmitted light, 
depressed globose, slightly papillate, 150-200//. diam. 
Sporules very numerous, brown collectively, yellowish-brown 
individually, shortly elliptical to oval, 4^-o!> X 2i-3p. 
On living Orange leaves. February, 1899. Doncaster, near 
Melbourne. It approaches C. fuckelii (Sacc.) in the size of the 
sporules, but they arc not olivaceous, and the habit is entirely 
dilferent. 
There is a variety in Europe —citri (Penz.), in which the 
sporules are 2^-3 X U-2^//. (Figs. 87, 88.) 
48. FAWN-COLOURED CONIOTHYRIUM. 
(Coniothyrium cervinum , n. sp.) 
Minute, black, punetiform, scattered pustules on irregular grey 
to fawn-coloured blotches, without definite margin, on still green 
leaf, commencing on upper surface, and ultimately penetrating 
entire tissue. 
Perithecia immersed, depressed globose, golden-brown by tran¬ 
smitted light, membranaceous, slightly papillate, round pore 
surrounded by black thick border, up to 220//. diam. 
Sporules yellowish-brown, elliptical, 5i-6A x 3-M/x. 
On Lisbon Lemon leaf. May, 1899. Burnley, near Melbourne. 
The irregular greyish to fawn-coloured blotches on upper 
surface of leaf are very characteristic, and when it has completely 
penetrated the tissue, a few perithecia may occur on the under 
surface. The sporules are slightly larger than those of 
Coniothyrium citricolum. (Figs. 113, 114.) 
3316. 
G 
