403 

 M. Ulrai, Fckl. Sjmb. p. 153. 



Exsicc. Fckl. F. Rh. 2008.— Ell. & Evrht. N. A. F. 2d iSer. 2611.— Thum. M, U. 1852. 



Perithecia gregarious, nestling in the inner bark, covered liy the 

 slightly blackened epidermis which is raised into slight pustules and 

 piei'ced by the papilliform ostiola, about 1 mm. diam., depressed-spher- 

 ical, coriaceous. Asci oblong, 8-sporcd, 250-300x30-35 ji, with abun- 

 dant paraphyses. Sporidia biseriate, broad cylindric-fusoid, 3-septate, 

 strongly constricted in the middle, brown, 50-70 x 15-20 //, eacli cell 

 with a large nucleus. 



On l)ark of elm, London, Canada. 



Differs from M. inquin-ans, in its smaller sporidia. 



M. Drykdis, Rostr. Fungi Gronl. p. 560. 



Perithecia scattered, spliaeroid-depressed, black. Ostiola snow- 

 white. Asci thick-cylindrical, 90-115x32-38 jjl, very short stipitate, 

 8-spored. Sporidia biseriate, oblong, 3-septa.te, constricted at the 

 septa, especially at the middle one, hyaline, surrounded by a rather 

 broad, hyaline stratum. No measurements of sporidia given. 



On the upper surface of dead leaves of Dryas octopetala, West- 

 ern Greenland. 



M. Platani, Ces. in Rab. F. Eur. 323 (1842), and Comm. Soc. Grit. 

 I, p. 217. 



Massaria atroitiquinans, B. & C. Grev. IV, p. 156 (1876). 

 Exsicc. Rav. F. Am. 669,— Ell. & Evrht. N. A. F. 2d. Ser. Cent. XXVIII. 



Perithecia gregarious, often in subcircinate groups of 4-8, lying 

 between the loosened laminse of the bark, depressed-globose, J-| mm. 

 diam., finally collapsing l^eneath, the sporidia oozing out and staining 

 the surface of the bark as in Melanconium. Asci broad clavate-cylin- 

 drical, 150-190x25-35 /z, subsessile, paraphysate. Sporidia irregu- 

 larly biseriate, oblong-elliptical, olive-brown, 3-6- (mostly 3-5-) septate, 

 slightly constricted at the septa, with a gelatinous envelope at first, 

 finally opake so that the septa can with difficulty be seen, 35-55 x 14 



In bark of Platanus, Carolina (Ravenel), Canada (Dearness). 



The perithecia are entirely concealed, their presence being indi- 

 cated only by slight, pustuliform elevations in the bark. The 3-sep- 

 tate sporidia are shorter and broader and- scarcely constricted at the 

 septa and are not usually mixed with the longer, narrower, mostly 

 5-septate sporidia in other asci in the same perithecium. The Canada 

 specc. do not differ essentially from those in our Herb, sent from Car- 



