Knight. — On the Lichenographia of New Zealand. 349 



Obs. — B. roseus (Sch. No. 31) tliallo granuloso, sporis fusiformibus leviter 

 curvatis (long. 015, crass. 0-0025 mm.) luteolis. B. byssoides (Schaer. 

 No. 32) hymenio fusco, sporis ellipsoideis long. 0*01 mm., crass. 

 0-004 mm. 



2. Thelotrema circumscriptum, n. sp. 



Thallus ex ochraceo pallido-fuscus laevis subnitiusculus tenuis continuus 

 linea fusca determinatus, verrucis apotheciorum heniispliasricis (diam. - 5 

 ad 1 mm.) prominulis, ostiolo simplici. Apotliecia immersa excipulo proprio 

 laterali dilute fusco instructa, matrice enata, madefacto epithecio in seclione 

 multo dilato, paraphysibus distinctis apice dilute coloratis. Sporse sub- 

 claviformes interdum oblong* hyalinae 6-12-septatae, long. 0-02 ad 0-035 

 mm., crassit. 0-005 mm. 



Ad cortices arborum. 



3. Thelotrema farinaceu in, n. sp. 



Thallus albus cartilagineus nitidus continuus, verrucis apotheciorum 

 globosis confertis. Apotliecia primum clausa tandem late aperta, disco 

 dilute colorato albo-pruinoso, margine albo elevato farinaceo, paraphysibus 

 subtilissimis subramosis. Sporse in ascis crebris monosporis oblongo- 

 clavatas circiter 14-septata3, longit. 0-14 mm., crassit. 0'04 mm. 



Ad arborum cortices. 



4. Pertusaria leucodes, n. sp. 



Thallus albus passim rimosus, verrucis apotheciorum convexis v. hemi- 

 sphaaricis concoloribus, ostiolo primitus minuto mox in pseudo-discum nunc 

 planum nunc urceolatum (interdum cavatum) confluentibus. Apotliecia 

 1-3 in quavis verruca, excipulo proprio nullo, hymenio thallo enato, para- 

 physibus adglutinatis clathratim-ramosis. Sporae 2, 4, 8na3, in iisdem 

 apotheciis, ellipsoideae simplices, pluries limbatas, longit. 0-05 mm., crassit. 

 0-02 mm. 



Ad arborum cortices, 



5. Pertusaria fumosa, n. sp. 



Thallus fumoso-nigricans intus albus tuberculosus, tuberculis apothe- 

 ciorum parvis globosis albescentibus mox hiantibus, epithecium urceolatum 

 nigrescens denudantibus, margine elevato nonnihil subtumido irregulari, 

 excipulo proprio nullo, hymenio strato gonimico oriundo, paraphysibus 

 adglutinatis obscure ramosis. Sporae in ascis clavatis ovoideaa simplices 

 anguste limbataa luteolaa, longit. 0-025 mm., crassit. 0-012. 



Ad arborum cortices. 



6. Phlyctis stromaphora, n. sp. 



Thallus crassus albidus granulosus areolatus, areolis nonnihil conglo- 

 batis. Apothecia in stromatibus thallinis creberrimis rotundato-difformibus 

 v. convexo-prominentibus v. planis inaaqualibus immersa, plura in singulis 



