142 TASMANIAN LICHENS. 



Gentjs 1. Mybiangium. Mnt. and Berk. 

 Characters above, as there is only one genus in the family. 



1. M. Duricei, M. and B., black, opaque, small, tuberculato 

 glomerate or noduloso confluent, often depresso pulvinate. 

 Apothecia small, black, slightly impressed. Spores oblong 

 or oblongo ovoid, variously septate, '02 to '036 x "009 to 

 '016 mm. Gel. hym. I. vinous. 



Hab. on bark of trees, especially on Acacia decurrens, S. 

 Esk at Launcestou, St. Mary's, Hobart, Mount Wellington 

 (and Weymouth), Huon Eiver. 



Family 3. Lichenace^. 



Thallus various in colour — white, whitish, cinerascent, 

 flavicant, rufous or fuscous, rarely nigrescent, various in form 

 — filamentous, foliaceous, squamose, crustaceous, pulveru- 

 lent, or evanescent. Apothecia various — stipitate, lecanorine, 

 peltate, patellulate, lirellate or pyrcnoid. 



Series I. Epiconiodei. 

 Apothecia with the spores naked, collected into a sporal 

 mass on the surface, Spores 8 in theca. 



Genus 1. Calicium. Ach. Nyl. 



Thallus filmy, granulose, powdery, squamose, or evanescent. 

 Apothecia minute, black, stipitate or subsessile, capitula 

 globose, or turbinate, or cupular. Spores fuscous or nigri- 

 cant. 



1. C.pliceocephalu77i, ^ov., var.alhidum, Wilson, whitish, thin, 

 smooth. Apothecia with slender, black, or fuscous stipe 1*5 

 mm. high, -05 mm. thick ; capitula obconical, "2 mm. broad, 

 with citrine powder on margin and beneath, sporal mass 

 umber ; spores spherical, diameter '002 to -003 mm., dilutely 

 f uscescent, containing a central locule. 



Hab. on decorticated decaying eucalyptus, and on stringy 

 bark of growing eucalyptus. Mount Wellington. 



2. G. Victories, C. Kn., white or whitish or cinerascent, more 

 or less marked, effuse. Apothecia black, -5 to 1 mm. high, 

 stipe -1 mm. thick, incrassate towards the base ; capitula 

 turbinato lenticular, or hemispherico lenticular, "25 to '5 mm. 

 broad. Spores simple, fuscous, or f uscescent, nucleus darker, 

 fusiformi ellipsoid, compressed, '005 to -008 x "002 to '003 

 mm., ana when viewed from the side -0015 wide ; paries 

 thick, defined by a dark line on the outside. 



Hab. on decorticated decaying eucalyptus. Mount Wel- 

 lington (and Weymouth), Mount Arthur. 



