1893.] NATURAL SCIENCES OF PHILADELPHIA. 131 



gitudinal septum often extending through all the cells, constricted 

 in the middle, hyaline and uniseptate at first, becoming yellow- 

 brown, 18-22 x 10-12/^, ends obtusely pointed or regularly rounded. 

 The perithecia are attenuated above into the ostiolum so as to be 

 subcorneal. 



Teichospora variabilis E. & E. 



On dead sage brush (Artemisia), Sheridan, Montana. Jan., 1892, 

 (Mrs. L. A. Fitch.) 



Perithecia scattered, erumpent-superficial, black, rough, depressed- 

 hemispherical, i-J mm. diam., at first partly covered by the loose 

 fibers of the weather beaten bark, finally collapsing above. Ostiolum 

 papilliform, finally perforated. Asci oblong, abruptly contracted 

 below into a very short stipe, paraphysate, 8-spored, 75-80 x 20-22//, 

 Sporidia biseriate or crowded, elliptical, at first of a uniform yellow, 

 soon becoming a bright golden yellow and 5-7-septate and muriform, 

 finally becoming almost black and opaque, 20-25 x about 12//. 



Teichospora nautica E. & E. 



On decorticated, weather-beaten, poplar limbs, in Mill Creek, 

 Sheridan, Montana. June, 1892. (Mrs. L. A. Fitch.) 



Perithecia scattered or gregarious, hemispherical or hemispheric- 

 elliptical, with the flattened base slightly sunk in the surface of the 

 wood, carbonaceo-membranaceous, about $ mm. diam., black, sub- 

 shining at the apex. Ostiolum papilliform, at length perforated. 

 Asci cylindrical, short-stipitate, 100-110x12//, paraphysate, 

 8-spored. Sporidia uniseriate or sub-biseriate, elliptical or slightly 

 ovate-elliptical, with three main transverse septa, often becoming 

 5-septate, with 1-2 of the cells divided by a transverse septum, 18- 

 22x8-11//. 

 Teichospora aspera E. & E. 



On old weather-beaten, cottonwood boards, Rockport, Kansas. 

 Jan., 1892. (Bartholomew, No. 853.) 



Perithecia gregarious, semi-erumpent, membranaceous, hemispher- 

 ical or depressed-globose, about i mm. diam., tubercular roughened, 

 collapsing when dry, with a broad papilliform ostiolum, finally 

 broadly perforated or sublaciniately ruptured at the apex. Asci 

 clavate-cylindrical, paraphysate, subsessile, 75-90x10-12//, 8-spored. 

 Sporidia mostly overlapping uniseriate, ovate-oblong, 3-septate, and 

 constricted at the middle septum (sometimes at all the septa), brown, 



