685 



first, finally opening partially. The perithecia are imbedded in and 

 covered, except the apex, by a thin, black, felt-like layer (Dendry- 

 phium) consisting of brown, branching hyphse, with abundant, cylin- 

 drical, nmltiseptate, brown, catenulate conidia 25-75 x 5-6 /x, borne 

 on short, upright branches. The septa in the conidia are about 4 /x 

 apart and there is a more or less distinct constriction at each septum. 

 Asci clavate-cylindrical, paraphysate, 8-spored, subsessile, 70-75 x 

 8-10 fx. Sporidia biseriate, fusoid , slightly curved, hyaline, 4-nucleate, 

 finally uniseptate and slightly constricted at the septa, 20-25 x 3|-4J jx. 



On rotten wood, St. Martinsville, Louisiana (Langlois). 



It is not improbable that the sporidia may become 3- or more- 

 septate, but none were seen with more than one septum. 



6. Cyrillse, (B. & C.) 



Hysterium Cyrilltz, B. & C. Grev. IV, p. n. 

 Glonium Cyrillcs, Sacc. Syll. 5593. 



" Scattered, elevated, opake, elliptical, even. Sporidia biseriate, 

 oblong, 10 jx long; endochrome divided into two portions, one of 

 which is less than the other, epispore thick." 



On twigs of Cyrilla, South Carolina. 



GL hyalosporum, Ger. in Peck's 31st Rep, p. 49. 



On dead wood, Willowemoc. The name only is given, without 

 any diagnosis. 



ACTIDIUM, Fr. 



Obs. Mycol. I, p. 190, S. M. II, p. 595. 



Perithecia sessile, rotund-lobate, subcarbonaceous, nearly closed ; 

 dehiscence radiate, from the center towards the margin. Asci elon- 

 gated, mostly 8-spored and aparaphysate. Sporidia oblong, biloeolar, 

 hyaline. Allied to Glonium, but less perfectly developed. There is 

 never any open disk as in Hysterium and Phacidium. 



A. caricinum, Schw. Syn. N. Am. 2019. 



Perithecia flattened, black, radiate-stellate, lobes oblong, obtuse, 

 rugose, at first covered by the epidermis, finally denuded. 



On culms and leaves of the larger Carices, Bethlehem, Pa. (Schw). 

 Actinothyrium occurs on the same leaves. 



A. diatrypoides, Cke. Grev. VII, p. 49, (without any diagnosis). 



On trunks of Carpinus and Ostrya, Darien, Ga. (Ravenel). 



