748 
Transactions of the Royal Society of South Africa. 
Hab. in foliis Cissi rhomhoideae, Winter's Kloof, Natal, 26/6/11, E. M. 
Doidge (1639). 
Meliola bifida Cke. Char, emend. 
Caulicola et amphigena, maculas atras velutinas efficiens ; mycelio 
ramosissimo ex hyphis 7-8 /x cr. septa tis composito, cellulis 15-18 /x long. ; 
ramis oppositis ; hyphopodiis capitatis numerosissimis, confertis, oppositis, 
15-18 /X long. ; cellula superiore cylindrica-ovata, convexa, 11-14 x 7-8 fi ; 
hyphopodiis mucronatis non visis ; setis mycelicis numerosissimis, rigidis, 
250-325 long. ; basi 10 /x, cr., apice bifidis, ramis 10-90 fx long., saepe 
bifidis, ramis ultimis quoque apice bi- v. trifidis ; peritheciis inter setis 
absconditis, atris, verrucosis, 250-300 /x diam. ; ascis 2-3-sporis, sporidiis 
brunneis, 4-septatis, cylindraceis, utrinque rotundatis, ad septa leniter 
constrictis, 42-50 x 14-16 /x. 
Hab. in foliis Osyridicar])i natalensis, Natal, 14/7/15, leg. J. Medley 
Wood (9020). 
Summary. 
An account is given of the Perisporiaceae in the Union Mycological 
Herbarium ; this is a group of fungi well represented in South Africa, but 
up to the present only a few species have been described or recorded. 
Descriptions are given of forty-five fungi belonging to the Perisporiaceae, of 
which thirty-two are Meliolas and seventeen are species hitherto undescribed. 
Each species is illustrated by drawings made to scale with the aid of the 
camera lucida. 
Botanical Laboratories of the Union 
OF South Africa, Pretoria. 
EXPLANATION OF PLATES LVII— LXVI. 
PLATE LVII. 
FIG. 
1. Balladyna velutina (B. & C.) v. Holm, (a) Mycelium; (h) setae; (c) asci ; (d) 
ascospores. 
2. Dimeriella annulata Syd. (a) Fungus on leaf; (h) perithecia ; (c) ascus and 
spores ; (d) mycelium and sarciniform conidia. 
3. Dimeriella claviseta Doidge n. sp. (a) Perithecia; (6) asci; (c) spores. 
4. Dimerium intermedium Syd. (a) Pycnidium ; (6) perithecia ; (c) asci with para- 
physes and spores. 
5. Dimerium MacOwanianum (Thuem.) Doidge. (a) Mycelium ; (&) perithecium ; 
(c) spores. 
