186 KEY. J. M. CKOMBIE ON LICHENS 



Lecanora sublutescens, Nyl. Omnino videtur similis L. lute- 

 scent i, DC, sed saxicola et sporis non evolutis visis. Thallus sul- 

 phureus subleprosus CaCl croceo-reagens. 



On rocks. Swain's Bay. 



Only two small fragments seen. 



Tribe Pertusariei. 



Pertusaria perrimosa, Nyl. Ldch. N. Zeal. p. 253. Thallus albido- 

 cinerascens tenuis rimoso-diffractus vel rimoso-areolatus, nigro-limi- 

 tatus; apothecia in verrucis thalli convexis (saepius rimosis) innata, 

 nonnulla hymenia in quavis tali verruca thallina. Sporae 4-8nae, 

 longit. 0-055-0-105 millim., crassit. 003-0'07 millim. 



Thallus K e flavo mox cinnabarino-ferruginescens. Spermatia subrecta 

 vel vulgo leviter arcuata, longit. 0016-0023 millim., crassit. 0*005- 

 0006 millim. 



On rocks. Swain's Bay. 



Apparently not uncommon, though often barren. 



P. perrimosa, f. subferruginosa, Cromb. Thallus more or less 



ferruginous. 

 On rocks. Royal Sound. 



Sparingly gathered. 



P. cineraria, Nyl., sp. n. Thallus cinereus tenuis rugulosus areolato- 

 ritnulosus determinatus (K— ) . Apothecia nigricantia in protuberantiis 

 parum elevatis rotundato-difformibus (latit. 0*5-0'7 millim.) impressa 

 punctiformia (1-4 in quavis protuberantia thallina). Sporae 8nie 

 ellipsoiile^, longit. 0-035-0-052 millim., crassit. 0.016-0-024 millim. 

 lodo gelatina hymenialis intensive caerulescens (thecae praesertim ita 

 tinctae). 



A P. chiodectinoide, Bagl., Anzi, afBni differt thallo laevi depresso tenui 

 &c. In lamina tenui apothecii conspicitur epithecium (fuscescens) K 

 dilute subviolascens et thalamium flavescenti-tinctum (forsan ex 

 elementis stromaticis ita reagens). In P. chiodectinoide thallus intus 

 K flavens. Spermogonia non visa. 



On rocks. Swain's Bay. 



Only a single specimen gathered. 



Tribe Lecidei. 



Lecidea variatula, Nyl., sp.n. Thallus albidus, tenuiter subgra- 

 nulosus, dispersus. Apothecia fusca (vel juniora pallescentia) ant 

 demum nigricantia, plana vel concaviuscula, marginata (latit. 0*3-0'5 

 millim.), intus albicantia. Sporae 8nae incolores ellipsoideae simplices, 

 longit. 0011-0-015 millim., crassit. 0-006-0-007 millim., paraphyses 

 graciles disctfetae aequales (apice non crassiores), hypothecium incolor. 

 Iodo gelatina hymenialis non tincta, sed thecae solac cjcrulescentes 

 (dein violaceo-infuscatac). 



