110 
73. LEMON DOTHIORELLA. 
(Dothiorella limoni, n. sp.) 
Forming dark-coloured dots on the still green bark of Lemon 
twigs. 
Perithecia erumpent, then superficial, bright olive-green, com¬ 
posite; individual perithecia sub-globular, membranaceous, vari¬ 
able in size, wit h apical pore, 112-150 X 90-120/*. 
Sporules hyaline, oval to elongated-elliptic, somewhat variable 
in size, 8-11 X 3i-4^/o 
On Lemon twigs. October, 1898. Doncaster, Victoria. 
The ends of the shoots were decorticated and dead, but on the 
still green basal portion the perithecia were found. The perithecia 
are not very striking to the naked eye. Two species of this 
genus are recorded on the bark of Orange— D . guaranitica (Speg.) 
has rather large sporules, 24—26 x 12—15/*., and D. placenta, with 
obovate sporules, 15/*. long. (Figs. 158, 159.) 
74. ASIIY ASCOCHYTA. 
(.Ascochyta cinerea , n. sp.) 
Forming ashy-grey patches on dead twigs. 
Perithecia gregarious, densely crowded, immersed, black, 
membranaceous, 150-200/*. 
Sporules greenish in mass, and agglutinated together, colour¬ 
less individually, elongated elliptic, 1-septate, not constricted at 
septa, rounded at both ends, 11-14 X 4-4i/i*. 
On dead Orange twigs. 1898. Armadale, near Melbourne. 
On Lemon twigs, Lancaster, Victoria. 
The sporules in the early stages, and while still imicellular are 
pale green, but wbeu fully mature and bicellular are usually 
colourless. Potassium-iodide-iodine intensifies the green colour 
of the young sporules, and gives a faint tinge of green to the 
otherwise colourless mature sporules. 
It. differs from A. hesperulearuvi (Penz.) in the sporules being 
rounded at the ends, and not at all fusoid, and in forming pallid 
patches on the twigs. (Figs. 1G0, 161, 162.) 
75. BARK BLOTCII ASCOCHYTA. 
(Ascochyta corticola, n. sp.) 
Minute, brownish to blackish, densely gregarious, punctiform 
pustules, round or often elongated lengthwise, and slightly 
elevating the ruptured cortex. 
Perithecia erumpent, yellowish-brown to dark-brown by 
transmitted light, depressed globose to elongated lens-shaped,. 
