ASCOMYCETES 367 



Sphaerella tabifica, Prill, and Dell., Bull. Soc. Myc. 

 France, vii. 23, figs (1891). — Perithecia rotund, brown, 

 erumpent, mouth papillate, 150 \)^ diam. ; asci oblong- 

 clavate, obtuse, stipitate, 60-1 2 /x; spores hyaline, 2-celled, 

 upper cell ovate-rotund, lower narrower, slightly attenuated, 

 septum below the middle, constricted, 21 x 7"5 /x, 2-seriate : 

 paraphyses absent. 



Conidial stage {Phyllostkta tabifica, Prill, and Dell., 

 Fho/na betae, Frank). — -Conceptacles subglobose, pierced 

 by a pore at the summit ; conidia escaping in a muci- 

 laginous tendril, elliptical, hyaline, 5-7 X 3-4 {i. 



Gnomonia, Ces. and De Not. — Perithecia covered or 

 erumpent, glabrous, submembranaceous, often scattered, 

 ostiolum more or less elongated, cylindrical, central, or 

 lateral ; asci 4-8-spored, tunic often perforated at the 

 apex ; spores elongated, i-septate, hyaline ; paraphyses 

 usuallv absent. 



Gnomonia erythrostoma, Auersw., Myc. Eur. Pyren., p. 

 26, f. 127. — Perithecia innate, erumpent, shortly rostellate, 

 texture parenchymatous, rufescent ; asci cylindrical, shortly 

 stipitate, apex obtuse, apical lumen bifoveolate, 8-spored, 

 loo-i 10 X 12-15 /x ; spores distichous, cylindric-oblong, 

 rounded at both ends, spuriously i-septate below the 

 middle, not constricted, 4-guttulate, hyaline, furnished with 

 a small curved appendage which soon disappears, 18x5-6 

 [i ; paraphyses absent. Fuckel describes spermagonia as 

 follows : — Resembling Septoria. Perithecia ? subsuperficial, 

 gregarious on large, discoloured spots ; spermatia filiform, 

 continuous, curved, elongated, hyaline. 



Dipaorthe, Nits. — Perithecia membranaceous or subcoria- 

 ceous, often greyish within, most frequently furnished with 



