GLASGOW SOCIETY OF FIELD NATURALISTS. 215 



subtus pallidus vel versus ambitum obscurior, fuscescens vel etiam 

 nigricans, parce pallido rhizinosus et rugulosus j apotliecia fusca 

 (latit. 3-7 mm.) ; receptaculo Isevi margine fere integro ; sporse 

 8n£e, -008— -01 x -005— -006 mm. Terricola?, frequens. 



The reactions, as stated above, are constant throughout a large 

 series of examples, and are very characteristic. 



This lichen has evident affinities to P. limbata (Laur.), but the 

 peculiarities enumerated under the latter are entirely absent in 

 this, while the chemical reactions of the two differ to a slight 

 extent. 



Parmelia phseophana (Stn.) 

 var. stenotera; 

 laciniis angustioribus et ssepissime tenuiter nigro-marginatis. 



Besides these two Parmelige so nearly related, I possess speci- 

 mens of P. molliuscula in fine fruit, with the same thick stock -like 

 pale rhizinse, but in which the reactions of K on the medulla are 

 yellow, then a deep red. 



Parmelia hottentotta (Ach.) 



et var. pachythalla (Spr.) 

 etiam var. diachrosta (Stn.), 

 thallo plerumque pallide rufescente et medulla nonnihil rufes- 

 centi-colorata. 



Physcia chrysophthalma (DC.) 



var. capensis (Ach.) 

 Physcia fibrosa (Fr.) 

 Physcia leucomela (Mich.) 



Supra terram muscosam in Cave Mountain (J. H. M'Lea). 

 Physcia speciosa (Fr.) 



var. hypoleuca (Ach.) 



var. granulifera (Ach.) 

 Physcia csesia (Fr.) 

 Physcia parietina (DN.) 



Pannaria phloeodes (Stn.), sp. nov. 



Thallus albidus vel pallidus vel pallide cervinus, minute rugu- 

 losus quasi leprosus, adpresso-stellaris, laciniato-lobatus, lobis 

 contiguis interdum imbricatis et margine undulatis, subtus 

 pallidus rhizinosus passim nudus, rhizinis breviusculis pallidis 

 vel nigricantibus vel nigris; apothecia rufa conferta mediocria 



