Knight. — On the Licbenograpbia of New Zealand. 353 



18. Arthonia (Lecanactis) verruculosa, n. sp. 



Thallus sordide cinereus plus minus rimosus in agellos a bypotballo 

 (e matrice carbonizata constante) denudato metatus. Apotbecia bypo- 

 pla3odes fusco-atra rotundato-difforinia plana singulis tballi areobs verru- 

 culisve innata, verruculis vix elevatis, bymenio tenui dilute fusco, pseudo- 

 excipulo e matrice carbonizata constante, lamina sporigera obscura clatbra- 

 tim ramosa. Sporaa in ascis clavatis crebris emortuis fuscis cymbiformes 

 3-septata3 byalinaB, long. 0"014 mm., crassit. 0*005 mm. 



Act arborum cortices. 



19. Arthonia (Arthothelium) suffusa, n. sp. 



Tballus squamulis albidis conglutinatis minutissimis constans, subtiliter 

 areolatus, in agellos a bypotballo nigro denudato metatus. Apotbecia 

 bypoplaeodes minuta crebra nigricantia prominula rotundata nonnibil e 

 tballo sufiusa (latit. circiter - 5 mm. v. minora) a tballo interdum coronata, 

 excipulo omnino destituta, lamina sporigera obscure clatbrata. Spora3 in 

 ascis ellipsoideo-oblongis ovataa v. oblongae demum fuscaa, seriebus 7-9 

 transversim loculosas, loculis plerurnque 3 in quavis seriebus, longit. '033 

 mm., crassit. *028 mm. Matrix non mutatur. 



Obs. — Prope Arthoniam abnormem, Acb., et^L anastomosantem ; diflertvero 

 sporis majoribus. 



Ad cortices. 



20. Arthonia (Arthothelium) spadicea, n. sp. 



Tballus cinereo-albus uniformis tenuis lsevis linea nigra limitatus. Apo- 

 tbecia bypoplasodes spadicea v. ocbreo-fusca innata plana rotundato-dirTormia 

 v. irregulariter elongata (latit. circiter 1 mm.) a tballo non coronata, excip- 

 ulo omnino destituta, bypotbecio nullo, lamina sporigera floccosa — obscure 

 clatbratim ramosa. Asci pauci ventricoso-globosi (latit. 0-5 mm.) Sporaa 

 ovatae v. oblongaa fuscaa, seriebus circa 10 transversim loculosaa, plerurn- 

 que 5 in quavis seriebus, longit. "04, crassit. -018 mm. Matrix non 

 mutatur. 



Ad cortices. 



Obs. — Prope Arthoniam ccanthocarpam, Nyl. ; sed differt sporis coloratis 

 minoribus loculisque majoribus, et tballo continue 



21. Stigmatidium conjiuens, n. sp. 



Tballus ex albo cinereus cartilagineus continuus, protuberantibus tbal- 

 linis apotbeciorum vix ullis subconvexis confluentibus, ostiola minutissima. 

 Apotbecia orbicularia immersa excipulo proprio crasso dilute luteo-colorato 

 integro instructa, bymenio madefacto latit. cn*c. 0-3 mm., parapbysibus 

 distinctis apice non coloratis. Sporae in ascis cylindraceis oblongaa 4- 

 cellulaa byalinaa nonnibil luteobe, longit. 0-02 mm., crassit. 0-011 mm. 



Ad arborum cortices. 

 23 



