80 
On ripe Oranges and Lemons. October—March. New South 
Wales. 
This is a very common scab oil the Lemon particularly, greatly 
disfiguring the fruit and preventing it reaching its full size. 
Each flaky portion is permeated and overrun with hyphae, and 
countless conidia lie on the surface. The fungus seems to ap¬ 
proach nearest to Sporodesmium. (Plate V., Pigs. 23, 24.) 
14. BLACK SCURF. 
(ConiotheciUm scabrum , n. sp.) 
At first causing minute depressions on skin, then gradually 
spreading to form large black patches. Mycelium usually scanty, 
creeping, and consisting of pale-green septate hyphae, segments 
being very variable in shape and thickness, then becoming 
darker green, and ultimately of a greenish-brown tint. Conidia 
greenish-brown to smoky-brown, cruciately or radiately septate, 
quadrangular to oblong, but very variable, from 18yu. upwards, 
and clustered together into irregular masses. 
Arising here and there, and probably connected with it, are 
solitary, upright, greenish to brownish, simple, septate filaments, 
bearing conidia of tbc same colour at their apex, suggestive of 
Cladosporimn ami lie 1 m i ntho sp or in m . 
On still green Oranges and Shaddocks. April, 1899. Burn¬ 
ley, near Melbourne. 
I have assigned the fungus to the above genus because 
although other forms are present, this one is undoubtedly the 
most common. (Plate IV., and Figs. 25, 26, 27, 28, 29, 30.) 
15. WART-GROWING FUSARIUM. 
(Fusarium epithele , n. sp.) 
Minute pink cushions growing on warts of Lemon. 
Hyphae dense, septate, branched, slender, about 2/t. broad. 
Conidia produced at the tips, hyaline, curved, acute at both 
ends, with very distinct apparently projecting sopta, 3 septate, 
28-30 X 3 /t . 
On warts of Lemon. August and September, 1898. New 
South Wales (Meeking). 
The conidia are very regular in size, shape, and septation, 
and contents somewhat granular. It seems a very distinct 
species. (Fig. 31.) 
