LICHENES ANTARCTICI; 635 
modes of varying seem also to follow the same law. Thus 
both in North and South Polar regions, we observe Parmelia 
plumbea, Ach., passing into Parmelia rubiginosa, Ach.; this 
again into Lecidea thriptophylla, Ach.;.and finally the latter 
subsiding into Collema nigrum, Ach.; all identified by. the 
same structure of their apothecia, as well as' by the singular 
blue substratum of the thallus. We find the Acharian 
varieties of many of the European Cenomycides re-appearing 
in Antarctic regions. "Those Sticte, the patricians among 
Lichens, form a striking feature in the eryptogamic vegeta- 
tion of the south. There they occur, not only superior in 
Size and more numerous in species, but, contrary to what 
happens in Europe, they almost always bear apothecia. This 
fertility extends to other genera; so Parmelia diatrypa, 
Ach., nearly always barren with us, is found with crowded 
apothecia, in the south. In the following list, the genera of 
Acharius have been adopted, they seem ample for the pur- 
Pose. To say nothing of more modern proposals, Acharius 
himself seems to have multiplied his genera unnecessarily. 
Thus he founded Variolaria, Lepraria and Isidium upon 
characters drawn from their buds and not from their apo- 
thecia, which were unknown to him. As these have been 
detected, those genera have subsided into Lecidea and Leca- 
nora. Spiloma and Calicium and some new genera allied to 
the latter, and lately proposed, are all truly Fungi, which is 
evident, not only from their selecting decomposing organic 
matter whereon to grow, but more evidently from. the 
internal structure of their parts of reproduction.”—T. T. - 
1. Sotorina, Ach. 
l. S. aurantiaca, n. sp.; thallo foliaceo tenui lobato cinereo 
madore glaucescenti subtus albidiori fibrilloso, lobis rotun- 
datis integerrimis, apotheciis sessilibus planis tumidulis 
aurantiacis, n d 
Han. New Zealand. ; 
Thallus 1-2 inches wide, when moistened swelling up 
2A4A2 
