98 AUSTRALIAN FUNGI, 



cell somewhat tapering towards point of attachment, slightly 

 constricted at septum, 15-17 x 8-9 /m, but varying in size. 



Asci clavate, sessile, rounded at free end, 8-spored, 95-105 x 

 24-28 fi ; paraphyses hyaline, slender, branching towards apex, 

 about length of ascus. Sporidia distichous and monostichous 

 towards base, olive, slipper-shaped, 1-septate, unequally celled, 

 upper smaller, rounded at apex, of equal thickness throughout, 

 lower larger, slightly bulging at centre and tapering towards free 

 end, 30-35 x 10-11;.. 



Australian Alps, Yic. (Walter); on living leaves of Grevillea 

 victorice, F.v.M. 



D. orhiculare (B. & C), Ell. & Ev., on leaves of Ilex, has 

 orbicular crustaceous patches, but they are up to 1 em. diam.; 

 the perithecia are much smaller and amphigenons; and the sporidia 

 are considerably broader. 



In Saccardo's ' Sylloge Fungorum ' (Yol. xvi.) the genus 

 Dimerosjwriiim is divided into two subgenera, according as the 

 sporidia are hyaline or coloured. There is a general convenience 

 in thus distinguishing genera, and while Dimerosporium, Fckl., 

 will be reserved for those species with colourless sporidia, 

 Dimerinm, Sacc. & Syd., will include those with coloured sporidia. 



Adopting this classification the seven known Australian species 

 will be arranged as follows : — Dimerosporium ludwigianum, Sacc; 

 D. parvulum, Cooke ; Dimerium secedens, Sacc. ; D. synapheoe, 

 Henn.; D. tasmanicum, Mass.; D. tarrietice, Cooke & Mass.; D. 

 orhiculatum, McAlp. 



29. EXOASCUS BULLATUS, Fckl. 



Killara, Yic; on living leaves of Pear-tree; Oct., 1902. 

 30. Glceosporium walteri, n.sp. 



Pustules gregarious, minute, slightly elevated, becoming black, 

 at first covered by epidermis, finally ruptured, up to 200 fx diam., 

 on both surfaces of leaf but mostly on under, discoloured portion 

 with distinct black margin edged with brown. Conidia hyaline, 

 cylindrical, rounded at both ends or somewhat acute, 21-23 x 4^: 

 basidia slender, usually shorter than conidia, about 14-17 /^ long. 



