688 



dehiscing by a narrow cleft along the acute apex, thin, carbonaceous, 

 fragile; lips acute, closely connivent. Asci paraphysate, 8-spored. 

 Sporidia oblong, elongated, 3-multiseptate, hyaline, becoming yellowish. 



M. aggregatum, (DC.) 



Hysterium aggregatum, DC. Fl. Fr. VI, p. 168. 

 Mytilinidion aggregatum, Duby, 1. c. 



Perithecia collected in groups or patches, conchiforra, scarcely 

 J mm. long, carbonaceous, shining-black, opening with a narrow cleft. 

 Asci cylindrical, 120-130x10 /*, obtuse at the apex, 8-spored. Spo- 

 ridia subuniseriate, at first uniseptate, at length fusoid, 3-septate, 

 20-24x6-7 //, slightly constricted at the middle septum, olive-brown, 

 the terminal cells subhyaline. 



Found (sec. Gerard) on bark of red cedar, Staten Island, N. Y., 

 but the specimens sent by him are entirely without fruit. 



M. Californicum, Ell. & Hark. Bull. Torr. Bot. Club, VIII, p. 51. 



Perithecia conchiforra, about 350 // long, faintly striate, black: 

 lips at first closely compressed, finally slightly open. Asci clavate- 

 cylindrical, 35-40 x 7-8 jut, 8-spored. Sporidia biseriate, oblong-fusi- 

 form, yellowish, 3-septate, sometimes slightly constricted at the septa, 

 12-15 p. long. 



On dead foliage of Sequoia gigantea, California (Harkness). 



Closely allied to M. acicolum, Winter, and possibly not distinct. 



M. tortile, (Schw.) 



Hysterium tortile \ Schw. Syn. Car. No. 250, id. Syn. N. Am. 2065. 

 Mytilidion tortile, Sacc. Syll. 5709. 



Mytilinidion Juniperi, E. & E. Journ. Mycol. IV, p. 57. 

 Exsicc. EH. & Evrht. N. A. F. 2d Ser. 2152. 



Perithecia gregarious, superficial, lying in various directions on 

 the matrix, membranaceo-carbonaceous, black, brittle, shaped like 

 clam shells with the sharp edges pointing up, 1-1 J mm. long; lips 

 closed, acute, sides of the perithecia more or less distinctly longitudin- 

 ally striate. Asci cylindrical, p. sp. 75-80 x 6 //, with a stipitate base 

 12-15 fi long. Paraphyses obscure. Sporidia uniseriate, oblong, 

 3-septate, pale brown, 12-15x4-5 ju, ends obtuse, only slightly or not 

 at all constricted at the septa. 



On bark of Juniperus Virginicma, Carolina and Pennsylvania 

 (Schw.), also around Newfield, N. J. 



This agrees with specc. in Herb. Schw. Saccardo makes the 

 sporidia 3-septate and 28-30 x 7-8 /j. while in the asci, and when free, 



