1894.] NATURAL SCIENCES OF PHILADELPHIA. 341 



Stroma consisting of the slightly blackened substance of the bark, 

 convex, about 2 mm. diam., not circumscribed. Perithecia 4—1 in 

 a stroma, subglobose, \-i mm. diam., necks converging and united 

 above in a small, black disk which perforates the pustuliform- elevated 

 epidermis, but does not rise above it. Ostiola short, conic-cylindri- 

 cal, with a smooth, round opening, crowded and finally obliterating 

 the disk. Asci clavate- lanceolate, p. sp. 25 x 5,'j., 8-spored, para- 

 physate. Sporidia allantoid, hyaline, 8-10x1^-2//. Spermogonia 

 (Cytispora) in the young stroma, multilocular gray inside, opening 

 by a single, central pore. Spermatia allantoid, hyaline, moderately 

 curved, 4-5 x li,a. 



Valsa etherialis E. & E. 



On dead limbs of Acer rubrum, Nuttallburg, West Va., Feb. 

 1894 (L. W. Nuttall, No. 373). 



Stromata cortical, thickly scattered, convex, 1-1 •> mm. diam. 

 Perithecia 6-12 together, circiuate, buried in the unaltered substance 

 of the bark, small, 150-250,'a diam., their short necks terminating 

 in an erumpeut, compact fascicle of obtuse, black, slighly unbilicate 

 ostiola closely embraced by the epidermis and scarcely rising above 

 it. Asci (p. sp. ) fusoid, 15-22x4-42//, stipitate, 8-spored. 

 Sporidia biseriate, allantoid, hyaline, curved, slender, 5-6 x about 

 1/j.. When well developed, the epidermis is raised into subdiscoid 

 pustules in which the slight protuberances indicate the position of 

 the subjacent perithecia. 



V. delicatitla C. & E. has fewer, larger perithecia and broader 

 sporidia. V. mierospora Cke. & Plowr. bas also larger perithecia 

 and yellow'ish sporidia, and the ostiola are more or less distinctly 

 sulcate, indicating its close relationship to Eutijpella. In F. etherialis 

 the sporidia both in and out of the asci are perfectly hyaline. 



Eutypella densissima E. «fe E. 



On dead limbs of Aralia spinosa, Nuttallburg, W. Va. , Feb. 1894 

 (L. W. Nuttall, No. 363). 



Stromata scattered, cortical, depressed-conical, 2-3 mm. diam., 

 not circumscribed, but staining the bark olive-gray. Perithecia 

 numerous, often 50-70 in a stroma, 100-120// diam., closely packed, 

 their slender necks terminating in obtusely conical, 4-cleft, black, 

 densely crowded ostiola erumpent in a brown disk surrounded by the 

 ruptured epidermis. The disk is soon obliterated, so that only the 

 crowded, black, subshining ostiola are seen. Asci clavate-fusoid, p. 



