1890.] NATURAL SCIENCES OF PHILADELPHIA. 223 



subgenus Eutypella. The minute (32-4>] x 1 //..) sporidia dis- 

 tinguish it from V. ventriosa C. & E. In Grevillea 18, p. 86. 

 Cooke has published the Staten Island specimens as a new species 

 " Valsa clavulata Cke.," but at most this is only a robust form of 

 V. glandulosa Cke. which, as distributed in Rav. F. Am., certainly 

 has the ostiola sulcate as stated above. 



Valsa (Eutypella) canodisca, Ell. A Holway. 



On dead branches of Salix, Decorah, Iowa, May, 1886. E. W. D. 

 Holway. Stroma depressed-hemispheric, l2-2 mm. diam. flattened 

 nbove and covered by a circular blackish-gray definitely limited 

 disk 1-1 i mm. diam. and pierced in the center by the fascicle of 

 deeply 4-sulcate ostiola. Perithecia 6-15 in a stroma, seated on the 

 surface of the subjacent wood, ovoid or subangular from mutual 

 pressure, 1-i mm. diam. with thick black walls and contracted above 

 into short converging necks with quadrisulcate ostiola collected in a 

 slightly erumpent fascicle in the center of the disk. The upper part 

 of the stroma around and between the necks of the perithecia is filled 

 with whitish, grumous matter. Asci about 100 //. long including 

 the slender base (p. sp. 50x10-12 p..). Paraphyses filiform, 

 abundant. Sporidia eight in an ascus, allantoid, yellowish, moder- 

 ately curved 12-18x32-4//. The stromata are often confluent. 

 The wood beneath is marked by a distinct black circumscribing line. 

 The circular, flat, grayish-black disk is a distinguishing character. 



Pseudovalsa stylospora,E. & E. 



On bark of dead Acer spieatmn, London, Canada, March, 1889. 

 J. Dearness, 1506 (B.). Stroma cortical, convex 2-3 mm. diam. cov- 

 ered by the epidermis. Perithecia circinate 4-8 in a stroma, globose, 

 f mm. diam. collapsing when dry, contracted above into short necks, 

 terminated by small, globose ostiola, subseriately arranged and 

 erumpent through a small crack in the bark. Asci (p. sp.) 80-85 

 X 15 /J.. Sporidia biseriate, oblong-elliptical, hyaline and granular at 

 first, becoming brown and 2-septate and slightly constricted at the 

 septa, 25-30 x 10-14 //. Pycnidia central bearing cylindrical 3- 

 septate, hyaline stylospores 40-55 x 10-12 /j.. on short basidia. 

 Thyridaria fraxini E. & E. 



On bark of dead Fraxinus, London, Canada, Jan. and March, 

 1890. Dearness, 1371 and 1496. Perithecia thickly scattered, 

 buried in and almost filling the bark which is uniformly blackened 

 on the inner surface, globose 2-I mm. diam. coriaceous with thick 



