182 



each end. rounded above, straight or a little curved. 3-septate, and 

 >liglitly constricted at the septa, brownish, 16-18x4-6 fi. 



On dead limbs and wood. Carolina, Pennsylvania, Virginia, Ne\\ 

 York, California andCanada. 



M. cinereiun, (Karst.) 



Spheeria cinerea, Karst. Mj-c. Fenii. II, p. 91. 

 Melanomma cinereum, Sacc. Syll. 3259. 



Perithecia gregarious or crowded, attached to the inner bark, 

 and eruinpent through the variously lacerated epidermis, at length 

 bare and free, sphaeroid, smooth and subshining (at least when young), 

 black, 390-400 // diam., with a subpapillate or umbilicate-impressed 

 ostiolum. Asci cylindric-clayate, 120-140 p. long, 8-spored, with 

 abundant, filiform paraphyses. Sporidia subuniseriate or biseriate, 

 oblong, obtuse, 3-septate, the second cell generally somewhat enlarged, 

 slightly constricted at the septa, greenish-hyaline, then pale yellow. 

 20-28 x 6-10 fjL. 



On dead limbs of Salix groenlandica, Sukkertoppen, Greenland. 



M. parasiticum, E. & E. Proc. Acad. Nat. Sci. Phil. Pa., July, 

 1890, p. 240. 



Perithecia scattered or gregarious, superficial, ovate-hemispherical, 

 110-130 [JL diam., roughish, black. Ostiolum papilliform, soon per- 

 forated. Asci oblong-cylindrical, 40-50 x 8-10 //, sessile, without par- 

 aphyses. Sporidia crowded-biseriate, oblong-fusoid, 3-septate, and 

 finally slightly constricted at the septa, 10-12x3-4 //, pale olivaceous. 

 Spheeria nigerrima, Blox. (Cke. Hndl.)k. No. 2612), which is parasitic 

 " on various species of Diatrype" has sporidia 12|-20 p long and at 

 length multiseptate, and perithecia "sprinkled with short, stiff bristles." 



On old Diatrype stigma, Newfield, N. J. 



M. Commonsii, E. & E. Proc, Acad. Nat Sci. Phil., Pa., July, 

 1890, p. 239. 



Perithecia gregarious, ovate-globose, rough, black, minutely to- 

 mentose-pubescent when young, 110-125 p. diam. Ostiolum papilli- 

 form. Asci clavate-cylindrical, 50-55x7-8 //, with abundant, filiform 

 paraphyses. Sporidia biseriate, fusoid-oblong, 3-septate, slightly con- 

 stricted at the septa, olive-brown, 12-14x3-3J ;JL. 



Parasitic on Hypoxylon Saxwtfnts, Wilmington, Del. (Commons). 



