THALLi 7 



in the terrestrial Vaucheriae, tb •• trial Sphaen the i 



developed in free air; so also in Botrydium, Trentepohlia, and 



Mr. Berkeley finds thai " 1 1 1 « - main distinction between Fungi and Al 

 (including Lichens) consists in the fact that Fungi arc universally u 

 hv the matrix hv means of their mycelium, while Lichens and AJ 

 nourished at the exp use of the medium in which thej In 



cortical speciee of Lichens, indeed, there is a very intimat* 

 between t h<- bark and Btroma, but then in these cases there are the •_ 

 gonidia which do uol existinFungi. It is true that moulds will vegetate in 

 fluids ; but as soon as they assume their uormal form, then 

 between the immerged and free portion." 



Following these views, I venture to propose the followiu lie cha- 



racteristic marks of the 



AlLIAN< E8 OF THALLOGE] 



Ai.'.vles. — Cellular is plants, nourished through their whoL 



by the medium in which they vegetate ; living ■ 

 damp places; pr( by zoosp ured .7 



tetraspores. 

 •■axes. — Cellular powerless plants } nourished through their thallus (sj 

 or ■ m) ; living in air ; propagated by spores <■ 



or brown, and sometimes inclosed in asci ; destit 



turn 



LlCHENALES. — < '>!h.lar Jloicerless plants, nourished through th, 



face by the medium in which they vegetate; living in air; 

 propagated by spores usually inclosed in asci, and alt 

 having gm 



