( 294 ) 
inconspicuous, subpapillate; asci elliptical, about 75 x 12 4; 
paraphyses abundant, thread-like; ascospores distichous, 
hyaline, narrowly ovate, ends acute, 4-septate, strongly con- 
stricted at the second septum, about 20 x 
On dead leaves of 2icca sp., Stanford University, Cali- 
fornia, Nov. 26, rgo1, C. F. Baker, no. 17. 
Pyrenophora Tetraneuridis sp. nov. 
Perithecia scattered, buried, then erumbent, dark brown, 
not collapsing, about 200, ostiolum short-papillate, sur- 
rounded by a few stiff, brown, bristles; asci subcylindrical, 
about 175 x 35; paraphyses thread-like; ascospores dis- 
tichous, brown, elliptical, obtuse, 7-septate, not constricted, 
each cell 1-3 times vertically divided, about 4o x 18 p. 
On dead leaves of Jetraneurzs sp., King’s Cajion, near 
Carson, Nevada, June 14, 1902, C. F. Baker, no. 1068. 
Pleospora Silenes sp. nov. 
Perithecia gregarious on small blackened areas, prominent, 
soon free by the rupture of the thin cuticle, black, collapsing, 
about 200 # in diameter, ostiolum minutely papillate, incon- 
spicuous ; asci cylindrical or narrowly elliptical, short-stipi- 
tate, thick-walled, about 140 x 30 #; paraphyses thread-like, 
rather scanty ; ascospores distichous, ovate or elliptical, com- 
pressed, dark brown, 3-septate, one or both of the medial 
cells once vertically divided, slightly constricted at all the 
septa, ends obtuse, about 30-35 x 18 # by 14 # thick. 
On dead stems of Szlene sp., Clear Creek Cajion, near 
Carson, Nevada, July 5, 1902, C. F. Baker, no. 1255. 
On some of the stems there is also a Diplodia with spores 
14x9p. This may represent the pycnidial stage of the 
fungus. 
VALSACEAE. 
Thyridium Sambuci sp. nov. 
Perithecia thickly covering large areas, buried in groups 
0) ae or scattered, black carbonaceous, not collapsing, 
300- in diameter, paioluin erumpent, minutely papillate, 
free inet valsiform); asci cylindrical, stipitate, 150-200 x 
17-20 #2; paraphyses abundant, thread-like ; ascospores mon- 
ostichous, fuscous, elliptical, often slightly curved, 5-sep- 
tate, constricted at the middle septum, one or more of the 
medial cells vertically divided, 30-35 x 10-14 p. 
