The Scottish Naturalist. 253 



dissectis vel irregulariter dentatis (K flaventibus), subtus 

 niger et nigro-rhizinosiis ; medulla alba (K — , dein C addito, 

 leviter et sordide erythrinosa, sed C seorsum — ) ; apothecia 

 fusco-rufescentia vel badio-fusca, plerumque magna (latit. 

 3-20 mm.), receptaculo subpodicellato ruguloso et foveolato- 

 impresso, margine s^epe lobatulo et basi sulcato ; sporae 

 Snoe ellipsoideae, s^pe gibbosae, episporio incrassato, .028- 

 .038 X .016-.02 mm. lodo gel. hym. coerulescens prsesertim 

 thecarum. Spermogonia extus nigra innata; spermatia cy- 

 lindrica, Scepissime curvula, .oo5-,oo6 x .0009-.0011 mm. 

 Corticola prope Brisbane (F. M. Bailey). 



This lichen seems allied to P, nilgherrensis (Nyl.), or rather 

 to P. viacrocarpa (Pers.), but the descriptions of these are defi- 

 cient, and I have not seen authentic specimens of either. 



Par77ielia nigrescens sp. nov. — Sat similis P. perttisce. sed apothe- 

 ciis nigris, vel caesio-nigris et sporis (i-2)nis incoloribus 

 demum fuscescentibus, ellipsoideis simplicibus, episporio 

 incrassato, .04-.054x.024-.038 mm. lodo gel. hym. coer- 

 ulescens dein vinose fulvescens. 

 Supra lignum prope Wellington, N.Z. (J. Buchanan). 



The epithecium in this section shows as a rufo-fuscous almost 

 continuous layer composed of compacted cells. This may be a 

 state of P. pertusa, and, if so, is very characteristic. Even the 

 young apothecia are black. The thallus is pertused, and the 

 white medulla is rendered yellow by K. The thecae and spores 

 seem to be ultimately tinted rufo-fuscous together, &c. 



The Pa7'vielia mentioned in the ' Trans, of the Glasgow Tield 

 Naturalists' for 1876-77, under the name P. subceqiiaiis (Nyl.), 

 from the Cape of Good Hope, has peculiar spermatia, and is 

 likely to prove distinct. 



Parmelia toxodes sp. nov. — Sat similis P. stihcequanti (Nyl.) sed 

 thallo subtus toto pallido vel potius pallide lutescente etiam- 

 que rhizinis pallidis. Sporas, .012 -.016 x .007 -.009 mm. 

 Spermatia cylindrica curvula, .0045-.0055 x circ. .0008 mm. 



Supra muscos prope Boschberg in Africa Australi, a cl. P. Mac- 



Owan lecta. 



The spermatia are cylindrical, although when out of focus the 



extremities appear somewhat thickened. 



I possess also another Parmelia from N.Z., which is more 

 likely to be identical with snbceqnans ; but as the spermatia in 

 the latter have not been seen, the determination remains doubtful. 



