Kwieut.—On the Lichenographia of New Zealand. 353 
18. Arthonia (Lecanactis) verruculosa, n. sp. 
Thallus sordide cinereus plus minus rimosus in agellos a hypothallo 
(e matrice carbonizata constante) denudato metatus. Apothecia hypo- 
pleodes fusco-atra rotundato-difformia plana singulis thalli areolis verru- 
eulisve innata, verruculis vix elevatis, hymenio tenui dilute fusco, pseudo- 
excipulo e matrice carbonizata constante, lamina sporigera obscura clathra- 
tim ramosa. Spore in ascis clavatis crebris emortuis fuscis cymbiformes 
8-septate hyaline, long. 0:014 mm., crassit. 0'005 mm. 
Ad arborum cortices, 
19. Arthonia (Arthothelium) suffusa, n. sp. 
Thallus squamulis albidis conglutinatis minutissimis constans, subtiliter 
areolatus, in agellos a hypothallo nigro denudato metatus. Apothecia 
hypopleodes minuta crebra nigricantia prominula rotundata nonnihil e 
thallo suffusa (latit. circiter *5 mm. v. minora) a thallo interdum coronata, 
excipulo omnino destituta, lamina sporigera obscuré clathrata, Spore in 
ascis ellipsoideo-oblongis ovate v. oblonge demum fusce, seriebus 7-9 
transversim loeuloss, loculis plerumque 8 in quavis seriebus, longit. 033 
mm., erassit. 028 mm. Matrix non mutatur. 
Obs.—Prope Arthoniam abnormem, Ach., et A. anastomosantem ; differt vero 
sporis majoribus. 
Ad cortices, 
20. Arthonia (Arthothelium) spadicea, n. sp. 
Thallus cinereo-albus uniformis tenuis levis linea nigra limitatus. Apo- 
thecia hypopleodes spadicea v. ochreo-fusca innata plana rotundato-difformia 
v. irregulariter elongata (latit. circiter 1 mm.) a thallo non coronata, excip- 
ulo omnino destituta, hypothecio nullo, lamina sporigera floecosa—obscuré 
clathratim ramosa. ` Asci pauci ventricoso-globosi (latit. 0-5 mm.) Spore 
ovate v. oblonge fusce, seriebus circa 10 transversim loculose, plerum- 
que 5 in quavis seriebus, longit. '04, crassit. '018 mm. Matrix non 
mutatur. 
Ad cortices, 
Obs.—Prope Arthoniam xanthocarpam, Nyl.; sed differt sporis coloratis 
minoribus loculisque majoribus, et thallo continuo. 
21. Stigmatidium confluens, n. sp. 
Thallus ex albo cinereus cartilagineus continuus, protuberantibus thal- 
linis apotheciorum vix ullis subconvexis confluentibus, ostiola minutissima. 
Apothecia orbicularia immersa excipulo proprio crasso dilute luteo-colorato 
integro instructa, hymenio madefacto latit, circ. 0°38 mm., paraphysibus 
distinctis apice non coloratis. Spore in ascis cylindraceis oblonge 4- 
cellule hyaline nonnihil luteole, longit. 0:02 mm., crassit. 0:011 mm. 
Ad arborum cortices, 
