248 
Transactions of the Eoyal Society of South Africa. 
du Paraguay 3839 (Herb. Kew) on Bandia sp., Guarapi, Brasil ; on 
Basanacantha spinosa, Sao Leopoldo, Kio Grande do Sul, Herb. 
Theissen. 
var. megathyria Doidge, var. nov. 
Plate XIII, fig. 6. Slides XI, 16-19 ; XIII, 10 ; XXXI, 15 ; XXXII, 
16, 17; XXXIV, 4; XLI, 7. 
Mostly epiphyllous, forming minute, orbicular, black, crustaceous spots, 
1-3 mm. diam ; when tlie spots are hypopliyllous they frequently become 
confluent. Mycelium not effuse, irregularly branched ; hyphae flexuous, 
4-6 [X thick, radiating, olivaceous-brown ; cells 10-20 jj. long ; nodes 7-10 [x 
thick, as^'mmetrical, more or less spherical. Thyriothecia very numerous, 
densely aggregated and becoming confluent, flattened-hemispherical, outline 
orbicular or flattened by contact, 140-200 fi diam., composed of straight, 
radiating hyphae 2-4 thick, cells 4-6 /x long ; margin not fimbriate, de- 
hiscence stellate. Asci aparaphysate, ovate to sub-clavate, 8-spored, thickly 
tunicated, especially round the apex, 33-34 x 27-33 fx. Spores ellipsoid, 
1- septate, slightly constricted, light olivaceous brown, smooth, 16-20 x 
8- 9 /X ; upper loculus sub- spherical, 8-9 fx diam. ; lower loculus ellipsoid, 
9- 12 xS fx. 
On Tricalysia Sonderiana, nr. Durban, 25/5/1897, Wood (Wood No. 
6452 sub. A. tenuis). 
On Tricalysia Za^iceoZci/a, Amanzimtoti, 10/7/11, Doidge, 1576; Winters 
Kloof, 27/6/11, 1/6/15, Doidge, 1624, 8987 ; Claridge, 31/5/15, Doidge, 8992 ; 
Kentani, 16/12/14, Pegler (Pegler, 1970), 8787. 
On Bandia dumetoruni, Amanzimtoti, 10/7/11, Doidge, 1682; Lemana, 
Zoutpansberg, 14/8/11, Doidge, 1792; Umgeni, Durban, 10/7/15, Wood, 
9031. 
On Pavetta ohovata, Krantzkloof, Natal, 26/5/15, Doidge, 8985. 
On Alberta? sp., Buccleucli, Natal, Doidge, 10151. 
On Plectronia Guienzii, Hogg's Back, 15/1/18, J. & M. Henderson, 11347. 
Differs from the type in the size of the asci and thyriothecia ; the latter 
are much larger and the radiating hyphae composing the thyriothecial mem- 
brane narrower than in the type. The specimens from South Brazil have 
very small thyriothecia, 50-90 /x diam., with radiating hyphae 4-5*5 fx thick. 
This species occurs very commonly on Bubiaceae, and has been collected 
a number of times, especially in Natal. 
2. Asterina natalensis Doidge, sp. nov. 
Plate XIII, fig. 7. Slide XXXI, 11. 
Epiphyllous, forming thin black spots 2-4 mm. diam. ; mycelium slender, 
branching irregularly and anastomosing; hyphae 3-5 /x thick, hyphopodia 
fairly numerous, alternate or occasionally opposite, stipitate, 2 -celled, upper 
