l8 OTTO VERNON DAKBISHIRE, (Schwed. Südpolar-Exp. 



Verrucaria famelica nov. spec. 



(Plate 3. fig. 33.) 



Thallus nigrofuscus aut totus nigricans, tenuis, crustaceus aut nullus et apothe- 

 ciis solis constans et interruptus; gonidia protococcoidea; superne corticatus strato 

 tenui et nigricanti; apothecia pyrenoidea tota 0.25—0.5 mm lata; ostiolum minutum, 

 ad 20 /( latum; parathecium et epithecium nigricans; hypothecium pallidum; asci 

 60 — 70 /( alti, 16 — 18 u lati; paraphyses gelatinosae; sporae octonae, polyseriatim 

 dispositae, hyalinae, unicellulares, 18 — 20x6 — 8 /< magnae; habitat ad saxa, South 

 Shetland Islands, Nelson Island. 



Notes: This too is a rather small species but as the 'substratum is a light grey 

 and the apothecia and thallus dark brown or almost black the plant is easily seen. 

 The thallus consists either of small rounded patches of thin simple structure bearing 

 apothecia or the apothecia are found to be solitary and not connected with any 

 portion of the thallus. 



Verrucaria glaucoplacoides nov. spec. 

 (Plate 3. fig. 34, 35). 



Thallus crassus. profunde rimoso-areolatus, areolis 2 — 3 mm latis (et nunquam 

 majoribus), cinereo-fuscescens, interstitiis nigerrimis et profundis; gonidia protococcoi- 

 dea; hypothallus non bene visus, nigricans; apothecia pyrenoidea, thallo semiimmersa, 

 nigra, 0.1 — 0.18 mm lata; ostiolum minimum; epithecium nigrofuscum; parathecium 

 et hypothecium pallidum; sporae octonae, hyalinae, unicellulares 10 — 14x6 — S /t 

 magnae; spermogonia nulla visa; habitat ad saxa, Falkland Islands, Port Louis. 



Notes: This plant is in general exterior view not unlike Verrucaria glaucoplaca 

 Wain., especially when one compares the figure of this species in Wain. Belg. 

 (P- 37> pl- Ii "g- 5)- O ur species may in fact possibly be simply a smaller form of 

 this plant. The thallus of our plant has smaller aréoles and the spores too seem 

 to be smaller. The hypothallus of our plant is also generally black when it can be 

 made out at all. The deep chinks between the aréoles are well marked in both 

 species. They soon almost completely close up when the plant is moistened. 



Chaetomium Bacidiae nov. spec. 



(This species is not included in any of the statistical not« 



I have not been able to make very much out of this parasite. It is clearly a 

 species of Chaetomium. The apothecia are either embedded more or less in the 

 apothecia of the species of Bacidia or they project. They are covered with the 

 characteristic hairs. I was unable to make out spores properly. The parasite oc- 

 curred on Bacidia tuberculata, Falkland Islands. Port Louis. 



