186 



hut also scattered. Sporidia (sec. Cke. Grev. XV, p. 83), triseptate, 

 browu, 12-14 ji long. 



On rotten wood, Pennsylvania (Schw.) 

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



Perithecia subconic-globose, 300-350 /i diani., rough, black, with 

 a ratlicr broad, papilliforni, at length perfoi'ated ostiolum, erumpentr 

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

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

 100-110x15-20 a. Sporidia subluseriate, oblong or clavate-oblong, 

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

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

 size and shape. 



On decorticated wood of Plata7mti, Canada (Dearness). 



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

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

 smaller perithecia and absence of any subiculum ; from M. inspissum, 

 (Schw.), in its much larger sporidia, 



ZIGNOELLA, 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 Metasphoei-iam its super- 

 ficial or subsuperficial perithecia. 



Z. pnlviscula, (Cnrr.) 



Sph{eria pulvisciila, Curr. Linn. Trans. XXII. tab. IvVIII, fig. 52. 

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

 Zignoella pulinicula,^^cc. 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, naiTOwed below, 8-spored, 75-80x9-12 ii. Sporidia 

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

 18-20 x3|-4| 11. 



On rotten wood, London, Canada (Dearness). 



Sol-. Winter this sliould be iiicludcil iu Z. ovoidea, Fr. 



