ACROTHECA ARTHKINIUM. 373 



subacute at both ends, many guttulale, not septate, hyaline, 

 18 X 4 fji, in clusters of 2-4 at the tips of the hyphae. 



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



On fading leaves of potato (Solanum tuberosum). 



Tribe 5. Arthrineae. Sacc. 

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



Sterile hyphae creeping or obsolete; feilile somewhat 

 simple, hyaline, with thick black septa ; conidia 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 Camptoum by the lateral whorls of 

 conidia. 



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

 Forming small jet-black tufts ; fertile hyphae ascending, 

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

 thick, black, remainder hyaline; conidia fusiform, ends 

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

 lateral septa in a verticillate manner. 



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

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

 On dead leaves of Carex. 



Arthrinium 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 

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

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



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

 Sacc., Syll., iv. n. 1350. 



On leaves of Carex and Juncus. 



