420 PROCEEDINGS OF THE ACADEMY OF [1895. 



mostly constricted at the septa, yellow-brown, 20-27 x 5-6 p., 

 slightly curved, obtusely rounded above, gradually narrowed below. 



Differs from L. insidiosum in the sporidia being without appen- 

 dages. 

 Lophiostoma Dakotense E. & E. 



On decorticated limbs of Cottonwood, Populus monilifera. Dakota 

 Oct., 1894. Prof. T. A. Williams, No. 151. 



Perithecia gregarious, semi-immersed, subglobose, 200-250 //, 

 diam., black- brown, with a conical, slightly compressed ostiolum. 

 Asci clavate-cylindrical, short- stipitate, 65-75x10-12//, with 

 abundant, filiform paraphyses. Sporidia biseriate, oblong- fusoid, 

 uuiseptate at first, soon becoming 3-septate and constricted at the 

 septa, nearly straight, hyaline, or at length subolivaceous, 15-20 x 

 5-6 //. Accompanied by a Phoma with perithecia erumpent-super- 

 ficial, 100-120 ;/, diam., soon collapsed to almost cup-shaped, and 

 with oblong-elliptical sporules, 2-3 x 1-1} //., smoky-hyaline. Near 

 L. duplex Karst. but is smaller in all its parts. 



Cucurbitaria stenocarpa E. & E. 



On dead stems of Rhus diversiloba. Pasadena, Cala., Aug., 1884. 

 Prof. A. J. McClatchie, No. 766. 



Perithecia in groups of 2-6 together, bursting out through short, 

 narrow-elliptical, longitudinal cracks in the epidermis and not rising 

 much above it, subglobose, 350-400 <>. diam. , brownish-black, rough, 

 collapsing, with a small, papilliform ostiolum. Asci cylindrical, 

 short-stipitate, 100-110x8-10//, paraphysate, 8-spored. Sporidia 

 uniseriate, oblong-elliptical, 3-5-septate, mostly constricted in the 

 middle, one or more of the inner cells divided by a longitudinal 

 septum, hyaline at first, tardily becoming pale yellow-brown, 15-20 

 x 6-8 [i. 



Sphaerella Niootianae E. & E. 



On living bark of Nicotiana. Hollister, Gala., Dec, 1894. W. 

 C. Blasdale. 



Perithecia, mostly on light- colored spots, subcuticular, globose, 

 80-100 p. diam,, the papilliform ostiolum barely piercing the epi- 

 dermis, and soon deciduous, leaving the perithecia perforated above. 

 Asci oblong-obovate, sessile, aparaphysate, 35-45 x 15-20 //. Sporidia 

 crowded in the asci, oblong-obovate, uuiseptate, hyaline, obtuse, 

 scarcely constricted, 11-13 x 5-6 //. 



