GLASGOW SOCIETY OF FIELD NATUEALISTS. 213 



pallidas vel versus ambitum obscurior aut etiam nigricans, par- 

 cissime albido-rhizinosus et hinc inde rugulosus. 



Prope "Diamond fields," Dr. Shaw et saxicola prope Kyln 

 Vischrivier (P. MacOwan). 



It is rather remarkable that the reactions of the lower surface 

 of the medulla are indicated by (K — C — ). Those of the upper 

 surface are characteristic and constant throughout a large series of 

 examples. In my specimens of P. hypodysta from near Eome, as 

 well as in the present lichen, K has little or no reaction on the 

 upper surface of thallus. 



This is evidently distinct from P. mutaUUs (Tayl.), in the 

 colour of the thallus, etc. 



Parmelia subsequans (Nyl.) 



Parmelia laceratula (Nyl.) 

 * phricodes, 



Similis P. laceratula sed thallo densissime coralloideo-isidiato 

 et apotheciis majoribus (latit. 13-20 mm.) 



lodo gel. hym. non tincta, sed ea thecarum (prsesertim apicium 

 incrassatorum) coerulescens. 



Ad truncos arborum Montis Boschberg, prope "Somerset 

 East," legerunt MacOwan et Tuckerman. 



Parmelia Owaniana (Stn.), sp. no v. 



Thallus pallidus, flavescenti-pallidus vel etiam nonnihil pallido- 

 cervinus, tenuis, Iseviusculus hinc inde reticulatim rimulosus 

 (sicut in P. perforata), lobato-laciniatus, ambitu crenatus vel 

 plerumque anguste crenato-incisus et nigro-ciliatus (K e flavo 

 intense rubens fere sanguineus), subtus niger, rhizinosus ambitu 

 spadiceusj apothecia fusco-rufa (latit. 3-9 mm.), receptaculo 

 elevato ruguloso vel foveolato-impresso ; sporae Snse, ellipsoidese, 

 •012 - '014 X -008 -'01 mm.; paraphyses graciles in 'gelatina 

 firma involutes ut in P. laceratula. 



Spermogonia extus nigra plana ; spermatia recta exacte cylin- 

 drica, -01 --013 x (vix) -001 mm. 



It is difficult to guess what is the colour of this lichen in a 

 living state, but if one may judge by analogy, it should present 

 much the same appearance as P. perforata. In a dry state the 

 colour may be said to be a pale fawn, such as P. j^erforata, at 

 times, assumes. 



Parmelia thamnidiella (Stn.), sp. nov. 



Thallus pallide flavescens vel flavido-virescens (K flavens) 



