Bd. IV: il) THE LICHENS. 1 3 



with that of Anzia colpodes which has many spores in its ascus, I found that they 

 were of quite different structure. In the case of Anzia colpodes the hypothallus 

 consists of anastomosing filaments which are made up of single rows of cells. Each 

 filament is never more than one cell thick. In our new species the filaments making 

 up the hypothallus are many cells thick in section. Thus the hypothallus is a very 

 much firmer and stronger structure. I examined Anzia (subgenus PaWnop arme lid) 

 angustata as regards its hypothallus and found that it agreed in every way with 

 that of the new species dismissa. For theses two reasons I have removed the two 

 species angustata Müll. -Aug. and anzioides Darbish., which now would constitute 

 the subgenus Pannop arme lia of Anzia, into a separate genus Pannopanuelia (MüLL.- 

 Arg.) Darbish. The distinguishing features of Pannopanuelia are that it has a 

 very distinct hypothallus made up of threads which are multicellular in section. It 

 furthermore has eight spores only in each ascus. These points will also separate 

 this genus from Parmelia. Hue places Pannopanuelia as a section of Anzia, and 

 the latter as a subgenus of Parmelia. 



Pannopanuelia angustata Ml'LL.-Arg. is very like P. anzioides. But the nar- 

 rower endings of the thallus of the former are constricted in a characteristic manner. 

 For this reason Babington gave it the specific name moniliformis-». It is known 

 from New Zealand and Tasmania only. 



Parmelia cruenta nov. spec. 



(Plate 2, fig. 23.) 



Thallus foliaceus, adpressus, superne albidus vel pallide flavido-albidus, lacinia- 

 tus, laciniis instructus subimbricatis apicibus rotundatis irregulariter dichotome 

 divisis, 2 — 5 mm latis, axillis rotundatis, superne reticulato-rugulosis, K intense fla- 

 vescens et dein rubescens, subtus niger sed margine castaneus; rhizinis instructus ad 

 1 mm longis; interne K rubescens; marginibus saepius soralibus instructus; apothecia 

 nulla visa; habitat ad corticem arborum, Tierra del Fuego, Navarin Island. 



Notes: The determination of this species has caused me no little trouble as the 

 specimen before us has no apothecia. It is clearly related most nearly to Parmelia 

 laevigata (Ach.) Nvl. It is however separated from this plant by the uneven sur- 

 face which is not unlike that of Parmelia saxatilis (L.) Fr., but the reticulations 

 are more regular in this species than in our new one. 



Rinodina crassa nov. spec. 



(Plate 2, fig. 24.) 



Thallus crassus ad 3 mm, albido-flavescens, inaequalis, rimoso-diffractus et areo- 

 latus, quasi ambitu lobatus, squamulosus, K intense lutescens; hypothallus nigricans 



