186 



but also scattered. Sporidia (sec. Cke. Grcv. XV, p. 83), triseptate, 

 brown, 12-14 /i long. 



On rotten wood, Pennsylvania (Schw.) 

 M. sporadicum, E. & E. (in Herb.) 



Perithecia subconic-globose, 300-350 p diam., rough, black, with 

 a rather broad, papilliform, at length perforated ostiolum, erumpent- 

 guperficial, standing singly or oftener 2-4 subseriate in cracks between 

 the fibers of the wood. Asci clavate, subsessile, paraphysate, 8-spored, 

 100-110x15-20 //. Sporidia subbiseriate, oblong or clavate-oblong, 

 3-5- (mostly 3-) septate, brown, obtuse, slightly constricted at the 

 septa, especially at the middle one, 20-30x8-12 /i, very variable in 

 size and shape. 



On decorticated wood of Platcwiux, Canada (Dearness). 



Differs from M. cinereum, Karst, in its rough perithecia and 

 variable, 3-5-septate sporidia; from M. squamulatum, (Schw.), in its 

 smaller perithecia and absence of any subiculnm ; from M. inspissuyi, 

 (Schw.). in its much larger sporidia. 



ZItiNOELLA, Sacc. 



Sylloge II, p. 214. 



Perithecia subsuperficial, mostly gregarious, carbonaceous, black, 

 papillate, generally small, the lower part more or less sunk in the 

 matrix. Asci 8-spored, generally paraphysate. Sporidia ovate or 

 oblong, hyaline, pluriseptate. Differs from Metasphceria in its super- 

 ficial or subsuperficial perithecia. 



Z. pulviscula, (Curr.) 



Sph&ria pulviscula, Curr. Linn. Trans. XXII. tab. LVIII, fig. 52. 

 Melanomma pulviscula, Sacc. Mycol. Ven. Spec. p. 114. 

 Zignoella pulviscula, Sacc. Syll. 3627. 



Perithecia usually gregarious, often crowded, sometimes scattered, 

 superficial, hemispheric-conoid, black, smooth and bare, carbonaceous, 

 \-\ mm. diam., with a small, papilliform ostiolum. Asci clavate- 

 cylindrical, narrowed below, 8-spored, 75-80x9-12 fi. Sporidia 

 biseriate, fusiform, often slightly curved, hyaline, finally 3-septate, 

 18-20 x3|-4i t i. 



On rotten wood, London, Canada (Dearness). 



Sec. Winter this should be included in Z. ovoldea, Fr. 







