400 Transactions. — Botany. 



collection of dried specimens, however, was secured for the Herbarium of 

 the Colonial Museum, at Wellington, which will prove valuable for future 

 reference. No. 2, pi. xxxviii., shows a characteristic outlier of the trachy- 

 dolerite rock frequented by immense flocks of sea-fowl. No. 3, pi. xxxviii., 

 is the best harbour in the Island, and a favourite anchorage for sealers. 



Abt. XLIV. — On the Lichenographia of New Zealand. 



By Charles Knight, F.L.S. 



[Read before the Wellington Philosophical Society, 13th February, 1884.] 



Plates XXXIX.-XLI, 



1. Pilophoron colensoi (Bab.), Knight. 



(Syn. Stereocaulon colensoi (Bab.), Flora N.Z., vol. ii., p. 294 ; Nylander, Synopsis Lich., 



p. 232.) 

 Thallus caespitosus e podetiis formatus. Podetia intus solida dense granu- 

 losa, strato corticali tenuissimo e gonidiis veris constante. Apothecia 

 plura congesta capituliformia intus alba solida lecanorina,* juvenilia crasse 

 marginata ; excipulo thallode albo, corticis structura radiatim disposita, 

 gonidiis veris nullis. Sporaa in ascis cylindrico-elongatis octonae uniseriales 

 oblongo-ellipsoidea3 simplices subluteolae, longit. 0-009 mm., crassit 0'0025 

 mm. Cephalodia plura in apicibus ramorum brevium congesta, glauco- 

 coerulescentia, intus e granulis gonimis jiavo-viridis, in nodulis 2 ad 4 dispositis, 

 omnino constantia. 

 Supra saxa. 



Obs. — The discovery of the spores, now shown to be simple, distinctly 

 shows that Colenso's lichen belongs to the genus Pilophoron. Th. Mr. 

 Fries, in his " Monogr. Stereocaulorum et Pilophororum," p. 66, under 

 " Species minus cognitm," remarks that Stereocaulon colensoi is perhaps a form 

 of Ster. argus. This view must now be abandoned, as the latter plant has 

 cylindrico-fusiform multiseptate spores (see fig. 1*, pi. xxxix). Babington, 

 on the other hand, considers it allied to Ster. ramulosum, but the same ob- 

 jection exists to any proposal which would place Colenso's plant under the 

 genus Stereocaulon. 



2. Myriangium duricei (Mnt. et Berk.). 

 Thallus nullus. Apothecium tubercuiiformis e matrice erumpens (diam. 

 circiter 3 mm. vel amplius) toro crasso parenchymatico carbonizato margina- 

 tum ; epitheciurn carbonizatum ; hymenium parenchymaticum luteo-fuscum 



* Quia margo est thallinus, lecanorina nominatur. 



