186 



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

 brown. 12-14 n long. 



On rotten wood, Pennsylvania (Schw.) 

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



Perithecia subconic-globose, 300-350 ft diain., rough, hlack. with 

 a rather broad, papilliforni, at length perforated ostioliun, erumpent- 

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

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

 100-110x15-20 ft. Sporidia. sub biseri ate, 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 o Platanus, 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 subiculum; from M. i 

 (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 Metasphceria in its super- 

 ficial or subsuperficial perithecia. 



Z. piilviscula, (Cnrr.) 



Sph&ria pulviscula, Curr. Linn. Trans. XXII. tab. I/VIII, 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, 

 J-| mm. diain., with a small, papilliforni ostiolum. Asci clavate- 

 cylindrical, narrowed below, 8-spored, 75-80x9-12 //. S]>oridia 

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

 18-20x3J-4| p. 



On rotten wood, London, Canada (Dearness). 



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



