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EXPLANATION OF PLATES. 
drawings were made with the aid of the camera lucida.) 
Plate XXX. 
A. Perithecium (a) and ascus {b) of Podosi:)liacra leucotricha (Ell. & Ev.) 
B. Asci of Erysiphe Polygoni D.C. on Trimnfetta trichocarpa. 
Plate XXXI. 
Ujicinula polycliaeta (B. & C.) Trac. & GalL 
A. Perithecium ; B. asci ; C. ends of appendages. 
Plate XXXII. 
Uncinula Pterocarpi n. sp. 
A. Perithecium ; B. asci ; C. ends of appendages. 
Plate XXXIII. 
Uncinula aspera n. sp. 
A. Perithecium ; B. ends of appendages ; C. asci. 
Plate XXXIV. 
Phyllactinia corylea (Pers.) Karst., form on Combretum Zeyheri. 
A. Perithecia ; B. asci. 
Plate XXXV. 
Phyllactinia corylea (Pers.) Karst., form on Bhus incana. 
A. Perithecia ; B. asci. 
