444 PROCEEDINGS OF THE ACADEMY OF [1893. 



hyaline, 40-70x4-5,", (mostly 40-50// long), 6-8-septate. 



A. pygmaeum Sacc. and A. Clintonii Pk., have sporidia of equal 

 thickness throughout and in the latter, straight, but the three are 

 closely allied. 



Rosellinia Hystrix E. & E. 



On old hickory nuts, lying on the ground, Newfield, N. J. May, 

 1893. 



Perithecia gregarious, ovate, obtuse, 110-120// wide, 130- 

 150//. high, rather thickly clothed all over with short (8—12//.), 

 black bristles. Asci (p. sp. ) cylindrical, 35-40 x 6-7//, short- 

 stipitate, overtopped by the abundant, filiform paraphyses. Sporidia 

 uniseriate, short- elliptical, pale olivaceous, slightly compressed, 5-6// 

 long, about 2?// thick and 3J/Jt broad. 



Differs from the other bristly species in its smaller compressed 

 sporidia. 



Ceratostoma corticolum E. & E. 



On the inside of cast-off bark of Ailanthus decaying on the ground, 

 Newfield, N. J., March 21, 1893. 



Perithecia gregarious, globose about j mm. diam. or less, mem- 

 branaceous, black and rough, at first buried in the bark, with only 

 the point of the cylindrical ostiolum erumpent, at length more or less 

 distinctly superficial by the weathering away of the bark. Ostiolum 

 about as long as the diam. of the perithecium, smooth and black at 

 the apex, straight. Asci cylindrical, p. sp. about 75 x 7-8//, para- 

 physate?. Sporidia uniseriate, elliptical, continuous, brown, 12-14 

 x 6-7//. 



Differs from C. brevirostre (Fr. ), in its rough perithecia and 

 rather smaller sporidia, and from G. Therryanum, in its much smaller 

 perithecia. 



Ceratostomella microspora E. & E. 



On a rotten beech log, Alcove, N. Y. Sept., 1893. (C. L. Shear, 

 No. 174.) 



Perithecia buried in the wood, finally suberumpent, scattered, 

 minute (150// diam.,) ovate- globose, membranaceous, contracted 

 above into a cylindrical ostiolum 200-300//. long, the apex erum- 

 pent and slightly projecting. Asci clavate, aparaphysate, 16 x 3//. 

 Sporidia collected in the swollen apex of the ascus, allantoid, hyaline, 



