of Edinburgh, Session 1881-82. 
459 
tiguse, 2-4 mm. longse, §— J mm, latse, adpressse, subpinnatificlee, 
flavido-cinerascentes, convexse, leves et opacse, subtus fusco-pallidse 
et brevissime et parce rhizinosse ; apotliecia ignota. — Affinis P. 
Mougeotii et P. constridanti Nyl. — Quartzicola : B.C.S. 
Parmelia Schweinfurthii, Mull. Arg. : habitus ut in P. perlata 
v. ciliata , sed thallus ochroleuco-albescens, subtus atrofuscus, fere 
usque ad marginem sat copiose et longiuscule rhizinoso-crinitus, ad 
ipsos margines longe nigro-ciliatus ; lacinise ad margines isidioso- 
lacinulatse ; apothecia podicellata, alte urceolaria, ore conniventia et 
integra, demum |-1 cm. lata, dorso aspera, discus pallide fuscus ; 
sporse octonse, 22-25 /x longse, 12-15 /x latse, valde pachyderm ese. 
— Ramulicola : Schweinf. 
Physcia obscurella, Mull. Arg. : similis Ph. adglutinatse, sed 
minor, lacinise -J-J mm. latse, discretse, adplanatse, adpressse, obscure 
olivaceo-virentes ; apotliecia valde minuta, hypothecium hyalinum : 
sporai 12-15 /x longse, 7-8 [x lataL Inter Ph. affixam Nyl. et Ph. 
disjundam Krplh. quasi medium tenens. — Quartzicola : Schweinf. 
Physcia obscurella, Mull. Arg. v. fusca, Mull. Arg. : thallus 
olivaceo-fuscus. — Cum forma genuina crescens : Schweinf. 
Physcia endopyxinea, Mull. Arg. : similis var. acritce Ph. stel- 
lar is, sed hypothecium fusco-atrum et apothecia crassius marginata. 
Sporse ut in Ph. pida, ubi lamina multo altior et hypothecium 
subangustum. — Ramulicola : B.C.S. 
PLACODIEiE. 
Placodium bullatum, Miill. Arg.\ Lecanoram atram aut Phy- 
sdam cegialitam simulans, sed thallus ambitu demum distincte effi- 
guratus et sporse simplices, hyalinse, 10-12 /x longse, 5-8 fx latse ; 
apothecia crasse albido-marginata. — Graniticola : B.S.C. 
Ampiiiloma deplanatum, Mull. Arg. : thallus forma et magni- 
tude e ut in A. callopismate Mass., sed totus miniato-fulvus, lacinise 
tenuiores, magis adpressse, undique sequaliter confluentes et inagis 
adplanatse, undique concolores ; sporse 12 g longse, 7 /x latse ; 
VOL. XI. 3 N 
