The Lichens of Victoria. 171 



abundant. Spores nigricant or viresceuti nigricant, irregu- 

 larly ellipsoid, uniseptate, 01 to -02 x -008 to Ol mm., 

 with one or rarely two loeules in each cell. 



Hab. on sawn eucalyptus rails, Kew. 



This lichen is associated with Calicium nigaruin, var- 

 iiunutam, the Gallciuvi on the more decayed horizontal 

 tace of the squared rail, and the Trachylia on the perpen- 

 dicular lace. The spores ai-e tinged bottle green. 



8. T. emev(jens, Wilson. 



Thrtllus white or whitisli, thin, smooth, somewhat shining. 

 Apothecia seem to emerge fi'om among the fibres of the 

 wood, and at length barely stand out above the thallus, 

 to -o mm. broad. Sj)ores iusco nigricant, adhering closely 

 together, ellipsoid, about DOo x 'OOo mm., but very various 

 in size, uniseptate, with a locule in each cell. 



Hab. on eucalj^ptus rails in sub-Alpine regions, Mount 

 Macedon. Found also on Mount Lofty, in South Australia, 

 and Mount Wellington, in Tasmania. 



4. T. V I ciori< 1,11(1, Wilson. 



Thallus cinerascent, Ifhin, effuse. Apothecia tj'pically 

 sessile, but often very briefly stipitate, to 4 mm., high, disk 

 generally sulphureo pruinose, to "4 mm. broad. Spores 

 fuscous, oblongo ellipsoid, OOo to -OOG X "OOS to -OO^ mm., 

 uniseptate, with a nigrescent locule in each cell. 



Hab. on old eucalyptus rails. The fuscous epispoie readily 

 rubs off, leaving the spore nigrescent, ellipsoid, narrow at 

 each apex, and smaller, •004 to •OO.') x "002 to -003 mm. 



5. T. e.rigua, Wilson. 



T. exifjua, Wilson (Trans. Lin. Soc, 1S.90) on further 

 examination proves not to be a Trachylia. 



TlilBE 2, — SPH.EROPHOREI. 



Thallus fruticulose, ramose and raraulose, the apices sub- 

 globoso-incrassate, enclosing the apothecia, which are nuclei- 

 form, enclosed, ultimately exposed by the bursting of the 

 thalline coverino-. 



