1 84 BastoW, Lichen-Plora of Victoria. {,Vo\^'xxx 



Tribe 31. — THELOXREME.^i. 

 Thallus crustaceous ; gonidia chroolepoid ; apothecia 

 lecanorine, urceolate, persistently thalline begirt. 

 72. Ocellularia. Spores transversely divided, hyaline, loculi 



lentiform. 

 y^. Thelotrema. Spores parenchymatic, hyaline. 



74. PhcBotrema. Spores transversely divided. 



75. Leptotrema. Spores parenchymous, fuscous. 



Tribe 32. — Graphide.e. 

 Thallus crustaceous ; gonidia chroolepoid ; apothecia 

 lirelline (elongated from the orbicular form), margin 

 proper or obsolete. 



a. Apothecia scattered on thallus. 



1. Margin lecanorine, the inner proper margin 



rudimentary ; loculi of spores cylindrical. 



76. Dirinastriim. Spores fuscous, otherwise like a lecanore ; 



gonidia chroolepoid. 



77. Plcitygrapha. Spores transversely divided, hyahne ; para- 



physes connected. 



2. Proper margin black, opegraphine, locules of 



spores cylindrical or out of cylindrical 

 parenchymatous. 

 y%. Opegrapha. Spores transversely divided, hyaline ; para- 

 physes connected. 



79. Melanographa. As in Opegrapha, but spores fuscous. 



80. Melaspilia. Spores transversely divided, fuscous ; para- 



physes not connected. 



3. Proper margin, but sometimes thallino- 



corticate ; locules of spores lentiform or out 

 of lentiform parenchymatous. 



81. Gr aphis. Spores transversely divided, hyaline. 



82. PhcBOgraphis. Spores transversely divided, fuscous. 



83. PhcBographina. Spores parenchymatic, fuscous. 



4. Margin deficient ; locules of spores cylindrical 



or out of cylindrical parenchymatous ; spores 

 often out of hyaline, nigrescent. 

 {a) Paraphyses everywhere intimately con- 

 nected. 



84. Arthonia. Spores transversely divided. 



z^XArthotheliiim. Spores parenchymatic. 



{h) Paraphyses not connected, growing on 

 thallus and apothecia of other lichens. 

 87. Celidinm. Apothecium maculiform ; spores hyaline, four- 

 locular. 



