4926 N. NAOUMOFF. 
En voici la diagnose : 
Rhytisma xylostei n. sp. 
(Sacc. Sy. XVI, 790. — Engl. Jahrb. XVIII. p. 277, 1900). 
Ascomatibus innatis, epiphyllis, maculiformibus, rotunda- 
tis v. secus nervos effusis, 5-12 mm. diam... atris, subnitenti- 
bus. tuberculato-lirelliformibus. | 
Ascis fusoideo-clavatis, paraphysatis, 69-82 (-95) X< 8-11 y. 
octosporis. 
Sporidiis filiformibus utrinque acutis. guttulatis, continuis, 
hyalinis, 50-55 X 2,75 &. Paraphysibus filiformibus, 2-7 y 
crass., hyalinis. 
Est status ascosporus Melasmiæ Loniceræ A. JAcz, Hab. 
in fol. Loniceræ xylostei, distr. Perm, Rossiæ, 24, IX, 43. 
L.— Phoma Alyssi-alpestris nov. Sp. 
Pycnidiis sparsis, primo velatis, dein erumpentibus, sub- 
superficialibus, subglobosis, ostiolatis, nigris ; contextu pa- 
renchymatico ca. 17 u crasso, tenaci, ex cellulis pallide brun- 
neis, polygonalibus, 11-13 y diam. constituto, 200 y diam., 
140 y alt. - 
Sporulis bacilliformibus, 3 X 1-1,4u, hyalinis. Hyphis spo- 
riferis 3-5 y longis, simpliciis (?). 
Hab. in caulibus emortuis Alyssi alpestris, montis Sango- 
max (694 m. alt.), goub. Perm, Rossiæ, 27, IX, 13. 
D. — Phoma Mulgedii nov. sp. 
Pycnidiis gregariis. epidermide velatis, dein erumpentibus, 
ostiolatis, subglobosis v. depressis, 165-180 X 85-95 ; contextu 
parenchymatico crassiusculo, cellulis quadrangulatis v. 5-6- 
goneis, 7-15 y diam., brunneis. 
Sporulis late ellipsoideis v. cylindaceis utrinque roréntiétis 
3-k,4 X 2,2, hyalinis. Hyphis sporiferis 2,75-5,5 u longis sim- 
pliciüis. 
In caulibus siccis Mulgedii cacaliæfolii, distr. Perm, Ros- 
siæ, 411, IX, 45. 
6.— Phoma Schivereckiæ nov. sp. 
Pycnidiis sparsis, numerosis, primo epidermide tectis, 
