ASCOMYCETES 367 



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

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

 erumpent, mouth papillate, 150 p diam. ; asci oblong- 

 clavate, obtuse, stipitate, 60-12 p ; spores hyaline, 2-celled, 

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

 septum below the middle, constricted, 21 x T5 f*> 2-seriate; 

 paraphyses absent. 



Conidial stage (Phyllosticta tabifica^ Prill, and Dell., 

 Phoma 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 p. 



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 

 usually 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, 

 100-110X12-15 p- } 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 

 fj,-, 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 



