The Scottish Naturalist. 89 



On dead stems of Equisetum palustre in the Corbie Loch, 

 in September. 

 Septoria Lychnidis Desm. var. pusilla. 



Differs from type in the sporidia, which have only from 1 to 4 

 septat, and measure 35-50 by 1^-2, instead of being 5-7- 

 septate, and measuring 50-70 by 2^-3. 



On living leaves of LycJuiis diurna, at Dunottar, and near 

 Aberdeen, in August and September. 



S. cercosporoid.es sp. n. 



Spots irregular, ill-defined, black, most conspicuous on upper 

 surface of leaves. Pycnidia in groups, ellipsoid, about 90 by 

 70, thin, rather pale brown ; sporidia clavulate, with one end 

 blunt, thus resembling sporidia of Cercospora, 5o-5o by 2, 

 nearly hyaline, 6-8-septate. 



On Chrysanthemum Leucanthemum, near Montrose, in Oct. 

 Seems quite distinct from S. soda Pass., and from S. 

 Leucanthemi Sacc. and Speg. 

 S. Prunellae sp. n. 

 Spots irregular, but bounded by larger veins of leaves ; pycnidia 

 numerous, innate ; sporidia nearly hyaline, filiform, 45 by 1, 

 multiseptate. 



On living leaves of Prunella vulgaris, at Dinnet, near Bal- 

 later, in September. 



Melanconie^e. 

 Cylindrosporium Oxalidis sp. n. 



Spots in leaflets, brown, dry, pale-margined, rounded, from 1 to 

 3 mm. across ; pustules scattered, subdermal, with a wide 

 pore for escape of the sporidia, which are filiform, slightly 

 tapering to the ends, curved, 20-25 by 1, and hyaline. 



On Oxalis Acetosella, at Portlethen, near Aberdeen, in Sept. 

 Agrees, on the whole, best with genus Cylindrosporium. 



Marsonia Melampyri sp. n. 



Spots in leaves, undefined, dark, becoming ne rly black; pustules 

 scattered in the spots, or in patches, translucent ; sporidia 

 hyaline, oblong-ellipsoid, slightly curved, scarcely constricted 

 at the septum, 12-20 by 3-3^; intermixed with chains of 

 hyaline cells 3-4^ by I. 



On Melampyrum pratense, at Dinnet, near Ballater, in 

 September. 

 M. PotentillSG (Desm.) Fisch. var. Tormentillse var. nov. 



