BY D. McALPINE. 41 



f mm. in diameter. Potassium-iodide-iodine differentiates the 

 basal stratum from the gonidiophores by colouring the former 

 yellow and the latter a beautiful indigo-blue, while the gonidia 

 are coloured a very pale yellow. GonidiojyJiores compact, erect, 

 colourless, septate, rounded at free ends, simple, 130-140 x 4 /x. 

 Goyiidia hyaline, straight or slightly curved, elongated, linear- 

 clavate, tapering towards attached end and blunt at the other, 

 multiseptate, up to 15-septate, often decidedly constricted at 

 septa, 47-60 x 31-41 ^. 



On bark of Tubernaemontana orientalis, R.Br.; April; Macleay 

 River, N.S.W. (Maiden). 



The simple gonidiophores and multiseptate gonidia seem to 

 point to Bactridium rather than Fusarium, but the firm, even 

 hard, tubercles most resemble the latter. 



The numerous distinct septa of gonidia (12 being a common 

 number) distinguish this at once from any described species with 

 compact tubercles. 



8. Phyllosticta soriformis, Cooke k. Mass. 

 (Plate ii. figs. 15-17.) 



Spots on both surfaces of leaves, orbicular, commonly 2 mm. 

 diameter and up to 5 mm., confluent and then may be ^ inch or 

 more and sometimes entire surface of leaf is more or less a con- 

 tinuous mass, pale reddish-brown without distinct margin, and 

 sometimes entirely covered by the minute, black, densely aggre- 

 gated, prominent perithecia. Mycelium composed of pale green, 

 creeping, septate, much-branched anastomosing hyphse, 4-5 fi 

 broad and producing two kinds of reproductive bodies, (o) 

 Gonidia laterally and terminally at the ends of branches, bi'own, 

 cylindrical, rounded at the ends, triseptate, slightly constricted 

 at sejata, Helminthosporium-like, 17-20 x 5^-7^ fx. (b) Perithecia 

 punctiform, run together, arranged like sori of uredines, sub- 

 cuticular and buz'sting through cuticle. Sporules rod-like, 

 hyaline, 4x1^. 



On leaves of Persoonia salicina, Pers., and /'. lanceolata, Andr., 

 May-September; National Park, near Sydney (Maiden). 



