ACKOTHECA — ARTHRIXIOI. 373 



subacute at liotli ends, many guttulate, not septate, hyaline, 

 18 X 4 /I, in clusters of 2—4 at the tips of the hyphae. 



Aerotheca solani, Sacc, Syll., iv. n. 1342. 



On fading leaves of potato (Solarium tvberogum). 



Trite 5. Arthrineae. Sacc. 

 AETHEINIUM. Kunze. (fig. 21, p. 358.) 



Sterile hyphae creeping or obsolete; fertile somewhat 

 simple, hyaline, with thick black septa ; couidia lateral, 

 whorled, often in fours, fusoid, oblong, or columnar, conti- 

 nuous, brown. 



Arthrinum, Kunze, Heft i. p. 9 ; Sacc, Syll., vol. iv. 

 p. 279. 



Distinguished from GampUmm by the lateral whorls of 

 conidia. 



Arthrinium earicicolum. K. & S. (fig. 21, p. 358.) 

 Forming small jet-black tufts ; fertile hyphae ascending, 

 rod-like, 50 x 4 /x, apex obtuse, transverse septa crowded, 

 thick, black, remainder hyaline; conidia fusiform, ends 

 obtuse, smoky, 50 X 8 /j,, springing from the apex and 

 lateral septa in a verticillate manner. 



Arthrinium earicicolum, Kunze and Schm., Myk., Heft i. 

 p. 9, t. 1, f. 4 ; Sacc, Syll., n. 1349. 

 On dead leaves of Garex. 



ArthriniTim sporophleum. Kze. 



Forming small black tufts, hyphae slender, hyaline, 

 nodulose and with crowded black septa, simple, base some- 

 times slightly inflated ; conidia oblong or ovoid, somewhat 

 inequibteral, rather acute at both ends and with a colour- 

 less apiculus, in verticels of four, 9-14 fi. long. 



Artlirinium sporophleum, Kunze, Myk., Heft ii. p. 104 ; 

 Sacc, Syll., iv. n. 1350. 



On leaves of Garex and Juncug. 



