Knight. — On the Lichenographia of New Zealand. 401 



multivesiculare, vesiculis sp arsis singulis ascum globositm singulum inchodentibus, 

 paraphysibus nullis ; hypothecium discretum nullum. Spora3 octonae ob- 

 longse utriuque obtusae uonnihil incurvae hyalinae normaliter 3-septatae, 

 loiigit. 0-02 mm., crassit. 0-0075 mm. 



Ad cortices arbor um. 



Obs. — The Bev. Churchill Babiugfcon in " Flora of New Zealand," p. 

 310, places under the head of Myriangium, inconspicuum a lichen which Dr. 

 Nylander has since shown to be an Arthonia allied to Arth. lurida and has 

 named Arth. conspicua (see Ny lander's Lich. Novo-Granatense, note, p. 67, 

 1st ed.). Babington in his remarks does not seem to be aware that there 

 exists in New Zealand a true Myriangium, viz., Myr. durimi, a perfectly 

 developed species of that very curious genus. 



3. Physcia adglutinata, Flk. 



Thallus membranaceus cinereo-fascescens v. livido-fuscus, e laciniis parvis 

 multifidis tenuibus arete adpressis formatus. Apothecia sessilia nigro-fusca 

 nuda, margine integro. Sporae ovoideo-ellipsoidese 2-cellulae, cellulis nor- 

 maliter tubulo in axi sporae disposito junctis, fuscescentes, longit. 0-018 

 mm., crassit. 0-009 mm. 



Ad cortices arborum, socia fere semper Physcia stellaris. 

 4. Physcia synthalea, sp. n. 



Thallus cinereo- vel glauco-albicans ad matricem arete adglutinatus, tenuiter 

 membranaceus laciniatus, laciniis fragilibus dilatis rugoso-plicatis confluenti- 

 bus, apicibus varie crenatis passim per tusis, subtus concoloribus nudis. Apo- 

 thecia cerino-flava mox sat fusca plana, margine thallode pallid o tumido 

 saspissirne integro. Sporae fuscae 4-6-loculares, loculis aut discretis aut tu- 

 bulo conjunctis, nonnihil varie septatse, longit. 0-02 mm., crassit. 0*013 mm. 



Ad cortices arborum. 



5. Pannaria brunnea var. pulverulenta, Knight. 



Thallus cinereo-fumosus granulato-squamulosus mox in crustam pulverulento- 

 granulosam conglobatus, hypothallo fusco-atro, granulis gonimis viridis 

 parvis. Apothecia rufo-fuscescentia innata conferta interdum symphicar- 

 pea plana, madefacta convexa excipulo composito marginata, margine thal- 

 lode tenui pulverulento-granuLoso, excipulo proprio dilute colorato, textura 

 supra radiatim disposita ; hymemum hypothecio crasso strato gonimico 

 imposito enatum, paraphysibus adglutinatis. Sporae in ascis cylindrico- 

 elongatis ellipsoideae incolores, longit. 0-016 mm., crassit. 0*008 mm. 



Supra terrain humidam. 



6. Lecanora cyrtospora, sp. n. 



Thallus albo-cinereus tenuis minute granulosus continuus (linea atra limi- 

 tatus ?) apothecia scutelliformia (diam. 2 mm.') grisea pruinosa plana intus 

 fusca excipulo mere thallode marginata, margine crasso pallido irregulariter 

 26 



