Knight. — On some New Zealand Lichens. 363 



longit. 0-017 mm., crassit. O'Ol mm. 



Ad saxa. 



Thallus crustaceous, citrine, areolate, areolae covering the brown hypo thallus, 

 bordered by a dark line. Apothecia minute, black, bound by a citrine-coloured 

 thalline margin. Spores brown, ellipsoid, 1-septate, 0-017 millim. long, 0-01 

 millim. thick. 



17. Ascidium melanosporum, sp. n. 



Thallus crustaceus, verrucosus, eborinus. Apofheciurn hemisphericum, 

 apice depresso-umbilicatum. Perithecium nigrum, globosum, apice poro 

 pertusum. Nucleus paraphysibus tenuibus farctus. Thecse mono-sporse. 

 Spora magna, fusiformis, multicellulosa vel muricata, demum fusca, opaca, 

 longit. 0-18 ad 0*2o mm., crassit. 0'065 ad 0*09 mm. 



Ad corticem arborum. 

 - Thallus crustaceous, verrucose, cream-coloured. Apothecium hemispherical, 

 depressed at the apex. Perithecium black, globose, opened by a pore at the 

 apex. Nucleus with slender paraphysis. Theca 1-spored. Spore large, fusiform, 

 many-celled or muricated, at length brown, opaque, 0*18 to 0-25 millim. long, 

 0-065 to 0-09 millim. thick. 



On bark of trees. 



Differs from A. doming ense and A. cinchonarum, in the spores being 

 irregularly cellular, much broader, and at length quite opaque. {Vide Tab. 1, 

 fig. 20, Nyl. Prod. Flores Novo-Granatensis, Lichenes.) 



18. Melaspilea metahola, Nyl. Lich. Novse Caledonise, p. 69. 



Thallus cinereus, diffracto-rimosus vel areolatus, tenuissimus. Apothecia 

 nigra vel fusca, mediocria, rotund ato-lecideoidea (juniora punctiformia), convexa, 

 immarginata, intus pallido-incoloria. Sporrn incolores, cylindracese, inferne 

 magis attenuatse et curvatulse (ssepe in capillam productse), murali-divisse, 

 longit. 0-075 ad 0-1 mm., crassit. 0*01 mm. 



Ad cortices arborum. 



Thallus ashy, cracked or areolate, very thin. Apothecia black or brown, 

 medium size, rotundato-lecideoid — younger mere spots — convex, immarginate, 

 pale within. Spores colourless, cylindrical, curved, attenuated below, often 

 terminating in a hair, muriculate, 0'075 to 0*1 millim. long, 0-01 millim. 

 thick. 



On bark. 



19. Squamaria perrugosa, Nyl. 



Thallus cinereo-fuscus vel cinereo-rufescens, adpressus, tesselato-areolatus, 



areolis in centro depressis, versus peripheriam laciniato-divisus, laciniis 



pterygioideo-expansis. Cephalodia cerina vel ochraceo-rufescentia, demum in 



radios fissa. Apothecia ochro-badia, concava ; excipulum proprium marginem 



