8 
develop into small round discs. 'These form the central part of the stroma, and they later 
coalesce, forming stouter linear stromata which still show the original ring formation. 
Meanwhile the concentric ring formation continues at the periphery. The mature stroma 
is crustaceous in the centre, the original disc-like bodies having become confluent radially 
as well as laterally, but the concentric circles are still evident; the outer circles still 
comprise discrete, round, immature discs. The separate stromata vary considerably in 
length. 
An transverse section through a collective stroma, which also passes through single 
stromata, shows a chain of fruiting bodies with central attachment, and with a sterile 
central portion. 
The single stromata are thus attached to the leaf by their long axis, lying free on 
both sides of the keel formed by the fine of attachment. They are 320-420 u high. 
Beneath the sterile central portion the hypostroma fills the epidermal cells of the host 
in an area extending 100-120 vy in diameter. The hypostroma is not continuous, but 
more or less interrupted; and it produces numberless fine brown hyphae which pierce 
the cuticle and appear on the surface as a compact stroma. Asci club-shaped cylindrical, 
thick-walled round the apex, very briefly pedicellate, 45-554 x 14-18 u, eight-spored. 
Spores distichous, elongated, rounded at both ends, two-celled, brown, 14-18 x 4-5 up. 
Paraphyses filiform exceeding the asci in length, united above, and forming a somewhat 
coloured epithecium. 
6. Cocconia capensis n. sp. 
On leaves of Ochna arborea, Howiesons Poort, near Grahamstown, 12.7.19, Doidge 
[12373]. 
Stromata epiphyllous, round, dull black, minute, up to 1-5 mm. diam., in appearance 
rather like a scale insect, centre raised, 130-150 py high, margin flat, appressed to leaf 
surface; centre sterile, surrounded by a single circular loculus, 240-270 u broad ; covering 
membrane black, opaque, about 13 u thick over the loculus, at the edge becoming some- 
what lobed, thin, flat, and light coloured, consisting of fuscous, radiating hyphae, 3-3-5 u 
thick. 
Hypostroma very well developed, penetrating right through the leaf and forming a 
tangled weft of hyphae in the intercellular spaces. At certain points the hypostroma 
becomes much thickened in the epidermal and subepidermal cells, and the hyphal mass 
becomes dark coloured and cellular, the cells being 6-7 » diam. 
It breaks through the cuticle and forms a short column of elongated cells, certain of 
which spread out radially on the leaf surface to form the hypothecium, and others growing 
to a higher level form the central sterile portion of the stroma, and give rise laterally to 
the covering membrane. The hypothecium is brown, 30-36 u thick and similar in texture 
to the hypostroma, but the cells are flattened and elongated in a radial direction. There 
are numerous secondary points of attachment along the axis of the loculus. 
Asci clavate, eight-spored, pedicellate, thickened round apex, paraphysate, 65-70 u-x 
22-25 u, they do not react to iodine ; paraphyses numerous, filiform. Spores two-celled, 
brown, 21-23-54 9-10 u, slightly constricted; in immature spores the cells are 
_ markedly different in form, they are equal in length, but the upper loculus is spherical, 
9 u diam., and the lower clavate, tapering from 7 u at the centre to 4 u at the tip. In 
mature spores the difference is less marked. 
Cocconia capensis Doidge nov. sp. 
Stromata epiphylla, sparsa, rotundata, atra, minuta usque 1-5 mm. diam., 130-150 u 
alta, pluries affixa, radiato ex hyphis 3-3-5u er. contexta; loculo unico annular’, 
240-270 uw lato, hypostromate epidermali et sub-epidermali oriunda. Hypothecium brun- 
neolum 30-36 u er. Asci clavati, paraphysati, octospori, pedicellati, ad apicem incrassati, 
65-70 » x 22-25; paraphysibus numerosis filiformis. Sporae brunneae, sub-clavatae, 
1-septatae, constrictae, 21-23-54 x 9-10 u, loculo supero latiore. 
Hab. in foliis Ochnae arboreae, Howiesons Poort, 12.7.19, leg. Doidge [12373]. 
