' X *4 )( 



>• 



quasi gelatinosa fusco-vel nigro- virescens, nec ni- 

 si adulta et crassior atque sicca rimis quibusdani 

 sparsis rarius notata. Tubercula atra mihi visa 

 sunt, interdum vix supra crustam elevata, saepius 

 vero aliquantum prominentia, admodum parva 

 plano- convexiuscula vel in medio depressa, unde 

 quasi marginata apparent. A. *) 



Postquam numerus Specierum Verrucarlae Generis jam adeo 

 increvit , ut difficultas eas perquirendi quodammodo levari 

 oporteat, sequentem earum distributionem , Thalii diversa 

 conformatione L. natura innixain, couficere studui. 



*LEIOPHLOEA, Thallus cartilagineo - membranaceus 

 contiguus laevigjatus tenuis. 



Obs. Species hujns subdivisionis in cortice arbomm Jaevi- 

 gata proveniunt ; quarum autem crusta humida gelatinosft 

 est saxis et terrae quasi adglutinautur. 



f Crusta tenerrima membranacea. 



Verrucaria nitida, V, tetracerae , V. aspistea , V. mamil- 

 lana, V. ocellata, V. analepta, V. punctiformis, V. ce- 

 rasiy V. epidermidis , V. gemmata, V. stigmatella, 

 V* melaleuca, V. carpinea ? 



ff Crusta subgelatinosa. 



V. mucosa, V. epigea. 



**CONIZAEA. Thallus lcprosus inaequabilis (nec laevi- 

 gatus) subcohaerens vel pulveraceus. 



Obs. Tam in saxis et ipsa terra, quam in lignis et arboruiri 

 cortice occurrunt Species huic subdivisioni adnumerandae. 



j-Crusta subcontigua vix pulverulenta. 



Verrucaria leucocephala , V. byssacea, V» velutina, 

 V. stictica, V. spongiosa, 



ff Ciusta pulveracea. 



V. farrea, V. thracona. 



*** JLITHOICEA. Thallus subtartareus rimoso - areolatus 

 vel veriucosus (raro subcontiguus 1, effiguratus.) 



