360 Transactions. — Botany. 



exemplis sublsevis, albidus vel pallido-cinereus yel cinereo-flavus. Apothecia 

 nigra vel caesio-pruinosa vel csesio-pallentia, plana, demum convexa ; margine 

 obtuso, ceraceo-pallido, quandoque subconcolori. Sporce ineolores, ellipsoidese, 

 interdum incurvae, saepius utroque apice acutiusculse, longit. 0*014 mm., 

 crassit. 0-007 mm. Hypothecium incolor. 



Ad cortices arborum. 



Thallus cracked, unequally granular, or granuloso-rimose, sometimes rather 

 smooth, white, or pale-ashy or ashy-yellow. Apothecia black or bluish 

 pruinose, at length convex; margin broad, waxlike, pale, now and then of 

 one colour with the disk. Spores colourless ellipsoid, sometimes incurved, 

 often rather acute at either end, 0-014 millim. long, 0*007 millim. thick. 

 Hypothecium colourless. 



The character of the thallus and the colours of the apothecia vary greatly, 

 but nevertheless nearly all the variations of the latter may be found in one 

 and the same plant. The thallus varies according to the nature of the bark it 

 grows on. A variety named by Dr. Ny lander (in a letter) Lecidea ccesio- 

 pattens, NyL, is best treated as a distinct variety. 



12. Lecidea planella, Nyl. Syn. Lich. Novae-Caledonia, p. 45. 



Thallus cinereo-virescens, effusus, tenuissimus vel evanescens, et ssepius vix 

 ullus. Apothecia adpressa vel peltata, albida vel carneo-pallida vel carneo- 

 lutea vel carneo-cinnabarina, ssepius undulato-difformia; margine paulo dilu- 

 tiore, evanescente, (latit. 0*1 mm. ad 0-25 mm.). Sporce octonse, uniseriales, 

 incolores, fusiformes, uniseptatse, longit. 0*008 mm., crassit. 0*002 mm. Para- 

 physes mediocres, apice clavato. Hypothecium incolor. 



Ad cortices fruticium et filicium et supra muscos. 



Syn. Bceomyces pertenuis, Stirton. Biatora cmnabarina, Bab., Flora N.Z., 

 p. 300. 



Thallus ashy green, effuse, very thin, frequently scarcely any. Apothecia 

 appressed or peltate, white or pale fleshy-coloured or fleshy-yellow or fleshy- 

 cinnabar, often undulate and irregular in outline, margin somewhat paler, 

 evanescent, (diameter 0-1. ad 0*25 mm.). Spores 8 in each ascus, in one row, 

 colourless, fusiform, 1-septate, 0*008 millim. long, 0-002 millim. thick. 

 Paraphyses club-shaped, apex nearly as broad as ascus. 



On bark of shrubs and ferns, and on mosses. 



I have no doubt that this is the Biatora cinnabarina of Babington (Flora 

 N.Z., p. 300), and certainly the Bmomyces pertenuis of Stirton. After 

 examining specimens from Mr. Buchanan's collection, and numerous specimens 

 in my own, I have met with no instance of spores with four cells in one case ; 

 there is an appearance of four divisions, but no more than one true septa. 

 The lichen agrees in every particular with Nylander's description. The 



spores in plate 129 C. 



uniseptate, 



