( 293 ) 
Phaeosphaerella scirpicola sp. nov. 
Perithecia scattered over the weather-bleached leaf-sur- 
faces, subsuperficial, minute, black, membranous, about 25 p; 
asci elliptical, 40-50 X x 18 13 paraphyses none; ascospores 
fascicled, cylindrical, about equally uniseptate, not con- 
stricted, hyaline till full maturity, then brown, with four 
prominent vacuoles in each cell, 30-35 x 
On dead leaves of Scrrpus sp., foot-hills near Stanford 
University, California, Jan. 1, 1902, C. F. Baker, no. 212. 
PLEOSPORACEAE. 
Didymella Delphinii sp. nov. 
Perithecia abundantly scattered over large whitened areas, 
buried, at length partially exposed, black, subspherical, 
prominent, not collapsing, 250-300 # in diameter, ostiolum 
minutely papillate; asci clavate, short-stipitate, 80-90 x 12— 
14 #3 paraphyses scanty, thread-like, delicate, inconspicuous ; 
ascospores distichous, hyaline, narrowly ovate, or subellipsoid, 
somewhat unequally uniseptate, constricted, the larger cell 
often subacute, the smaller one obtuse, 20-25 x 7-8 p 
On dead stems of De/phininm sp., head of Fall creck, 
Ormsby Co., Nevada, July 15, 1902, C. F. Baker, no. 1331. 
Pocosphaeria Dendromeconis sp. nov. 
Perithecia gregarious in lines, buried, at length exposed 
by the breaking away of the host tissues, clothed with short 
brown hairs when young, becoming subglabrate with age 
and exposure, black, hard, Senet not collapsing, 
250-350 7, ostiolum inconspicuous; asci cylindrical, 100— 
120 X 9-10 4; paraphyses see thread-like ; ascospores 
monostichous, light fuscous or yellowish, 3-septate, con- 
stricted at each septum, one medial cell slightly enlarged, one 
end cell conical and acute, the other rounded, 18-20 x 7-8 p. 
On dead stems of Dendromecon sp., foot-hills near Stan- 
ford University, California, Jan. 1, 1902, LeRoy Abrams, 
communicated by C. F. Baker as no. 224. 
Metasphaeria Yuccae sp. nov. 
Perithecia scattered, black, prominent, long, covered by 
the epidermis, at length suberumpent, about 200 #, ostiolum 
