1893.] NATURAL SCIENCES OF PHILADELPHIA. 129 



carbonaceous in texture, not easily broken. In this respect and in 

 its larger size it differs from R. mastoidea Sacc. 



Melanopsamma corticola E. & E. 



On outer bark of living Quercm alba, Newfield, N. J. July, 

 1890. 



Perithecia erumpent-superficial, scattered, hemispherical, black, 

 small (175-200//), the papilliform ostiolum situated in a slight 

 depression and soon deciduous leaving a small, round opening. 

 Asci fasciculate, oblong-cylindrical, 50-65 x 10—12/', with filiform, 

 branched paraphyses, 8-spored. Sporidia bisenate, clavate-oblong, 

 hyaline, granular and multinucleate at first, becoming uniseptate and 

 constricted at the septum, 12-15 x3-3£/*. 



This was accompanied by Amjihisphceria fallax DeNot. 

 Nectria nipigonensis E. & E. 



Parasitic on Diatrypella favacea, on dead birch limbs. Lake 

 Nipigon, Canada. Aug., 1884. (Macoun.) 



Perithecia 15-40, cespitose on the erumpent disk of the Diatrypella, 

 globose, about \ mm. diam., pale reddish-yellow, becoming darker, 

 collapsing at the apex, scarcely papillate, smooth. Asci cylindrical, 

 aparaphysate, subsessile, 50-55 x 6-7//. Sporidia subbiconic-ellipti- 

 cal, hyaline, uniseptate, scarcely constricted at the septum, 10-12 x 

 5-6//. Conical stromata (Tubercularia) mixed with the perithecia, 

 pale yellow, depressed-globose, about \ mm. diam., sessile, bearing a 

 peripherical layer of minute (3-4 x 1//), hyaline allantoid, slightly 

 curved conidia borne on slender, branching sporophores 20-25// 

 long. 



Lasiosphaeria trichopus E. & E. 



On rotten wood, London, Canada. (Dearness, 677 D.) 

 Perithecia densely gregarious, superficial, ovate, about 150//, 

 high, fringed around the base with short (35-60x3//), faintly 

 septate, spreading, brown hyphse, glabrous above ; ostiolum broad- 

 papilliform. Asci oblong-cylindrical, or clavate-cylindrical, sub- 

 sessile, paraphysate, 8-spored, 75-80 x 12-15//. Sporidia biseriate, 

 fusoid-oblong, slightly curved, obscurely 7-9 septate, granular, 

 yellowish, 25-40 x 6-7//. L. ccssariata C. & P. has perithecia black 

 and shining subglobose and twice as large as this. 



Trichosphasria subcalva E. & E. 



On rotten wood of Ostrya vlrginica, London, Canada. Aug., 

 1892. (Dearness, No. 1,987.) 



