860 REV. F. R. M. WILSON ON LICHENS 
specimen of this lichen is submerged in water, there arise from it 
on all sides streams of minute air-bubbles for å considerable time, 
showing the porous nature of the plant. It does not very appre- 
ciably increase in size when moistened, as the Collemacei do. 
When it is wet or bruised, a marked scent like that of some fungi 
is perceived, but this character it has in common with many other 
lichens, especially among the Cladoniei. 
. 90. MxuraNaivM DURLEI, Berk. et Mont. 
Infrequens in Mt. Macedon et Sandringham. Specimina a 
Victoria sporas minores habent quam ea a Nylandro descripta; 
long. 017—023 mm., lat. 006—009 mm.; sicut specimina a Queens- 
land; de quibus Dr. Knight scripsit ** The spores are usually 
smaller, and the cells constituting the mass of the thallus are 
darker and more opaque than those of European growth." 
31. MYRIANGIUM DOLICHOSPORUM, F. Wils., sp. nov. (Pl. 
XLIX. fig. 12.) 
Thallus ater, parvus, lat. 2-5 mm., alt. circa 2 mm., pulvinatus 
opacus vel nitidiusculus inæqualis.  Apothecia fere thallum 
circumtegentia et concolora plana vel concava, epitheciis sub- 
rufescentibus, lat. 1 mm. attingentia, marginibus thallinis rotundo- 
obtusis cincta, elevata vel stipitata stipitibus interdum ad long. 
1 mm. productis deorsum attenuatis. Thec» sphæroideæ in epi- 
thecii substantia cellulari disperse. Spore 8næ incolores cylin- 
drice simplices arcuate ad apices subacuminate minute guttatæ 
in axi longitudinali, long. '04 mm., lat. 006 mm. Gran. gon. 
diam. ‘002-007 mm. Textura cellulosa fusca, cellulis diam. *003- 
‘005 mm.— Habitat ad ramulos Hymenanthere Banksii in Mattra, 
Gippsland. Facile dignotum apotheciis stipitatis et sporarum 
forma, 
Fig. 12. Spore due. 
Fam. IV. LICHENACEL 
Tribe Canicrer. 
Dr. Nylander, in his ‘Synopsis Methodica Lichenum, says of 
the geographical distribution of this tribe, ** hemisphæram 
boreslem præprimis inhabitantes." “In Europa adsunt 33, in 
Gallia 27, in terris Scandinavis 25, in America boreali saltem 27, 
in hemisphæra autem australi coguita sunt solum 5, quarum 2 
in boreali deficiunt. Species totius telluris computatæ inveniun- 
tur 40." Exploration in Victoria leads to the conclusion that 
