Bd. IV: ıı) THE LICHENS. II 
Aspicilia orbiculata nov. spec. 
(Plate 2, fig. 21.) 
Thallus sordide albidus, profunde diffractus et tuberculato-granulosus; tubercula 
ad I mm lata; K minime flavescens; hypothallus nullus distinctus nisi alios lichenes 
tangens et dein nigricans; apothecia semper immersa, regulariter rotundata; epithe- 
cium nigricans, planum, epruinosum; amphithecium marginem thallinum producens 
bene distinctum; parathecium pallide fuscescens et etiam hypothecium; paraphyses 
apicibus incrassatis, simplices; sporae octonae, hyalinae, unicellulares, subrotundatae, 
9—I0ox6-—-9 ıı magnae; spermogonia et soralia nulla visa; habitat ad saxa, Falkland 
Islands, Port Louis. 
Notes: The feature of this species is the very regular round shape of the apo- 
thecia which possess a very dark epithecium. The thallus itself is of a very deeply 
chinked nature and it is practically broken up into a number of granular tubercles. 
Another feature of great interest is the shape of the spores which are very nearly 
quite round. The hypothallus is often itself not coloured but it forms a black ridge 
when our plant comes into contact with another lichen-thallus. 
Pannoparmelia (MÜLL.-Arc.) DARBISH. 
Thallus foliaceus, anguste laciniatus. Gonidia protococcoidea stratum continuum 
formantia sub cortice superiore. Stratum medullare inferius pannosum, ex rhizinis 
constitutum crassis et multicellularibus transverse et longitudinaliter. Apothecia par- 
melioidea. Sporae octonae. 
Pannoparmelia anzioides nov. spec. 
(Plate 2, fig. 22). 
Thallus albido-flavens, prostratus, laciniatus, K —; laciniae 0.5—I.o mm latae, api- 
eibus non moniliformiter constrictis; cortex superior 50—60 u crassus, ex hyphis 
eonstructus superficiei perpendicularibus, 4—5 ıı latis; medulla ex duobus partibus 
eonstructa; pars superior 30—50 u crassa, laxior, hyphis instructa 5—6 u latae; pars 
inferior medullae 40—60 u vel ad 0.1 mm crassa, ex hyphis constructa valde congluti- 
natis, 6 mm u crassis; gonidia stratum formantia ad 50—60 u crassum, protococ- 
coidea, subsphaerica, 6—10 u crassa; cortex inferior 20—60 u crassus, valde conglu- 
tinatus, obscurior, ex hyphis constructus hypothallum formantibus ad 150 u crassum; 
hypothallus ex fasciculis constructus anastomosantibus hyphorum valde conglutinatis, 
nigricantibus, 20 u longis sed contortis, 8$—IO u crassis; fascicula 8$—IO u crassa; 
apothecia parmelina, ad 6 mm lata, epithecio rufo; sporae octonae, simplices, ro- 
