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one species having been recognized from Van Diemen’s Land, and four in 
the United States. The plants occur equally on granitic and calcareous 
rocks. —— A tichia, Flot., a very little known corticoline lichen of Germany, 
is added to his Synalissaby Nylander. Pyrenopsis granatina (Sommert.) 
Nyl., and P. hematopis, Th. Fr., have already been considered, as per- 
haps better associable with our Pannaria. And the future may possibly 
witness other transfers in the same direction. 
S. Schererié (Mass., sub Pannaria. Pyrenopsis, Nyl.). Lime-rocks, 
Illinois, (E. Hall). Looking evidently towards Pannaria; and perhaps 
not in fact differing except in a certain Collemeine habit. S. polycocca, 
Nyl. Syn. (8. fuliginea, Tuckerm. in litt.). Granitic rocks, New Hamp- 
shire (Mr. Frost). ——S. pheococca, Tuckerm.' Upon similar rocks. 
North Carolina (Rev. Dr. Curtis). Massachusetts (Mr. Willey).—— &. 
phylliscina, Tuckerm.? Upon similar rocks, Massachusetts (Mr. Willey). 
——8S. symphorea (DC.) Nyl. (S. spherospora, Nyl. Syn., ‘forte non dif- 
fert;’ Nyl. Lich. Scand.). Calcareous rocks, Alabama (Mr. Peters).——S. 
Texana, Tuckerm.* Calcareous rocks, Texas (Mr. Wright). AndI have 
also scarcely sufficient specimens of another species (Mica-schist, Ver- 
mont, Mr. Russell) which greatly resembles Psorotichia riparia, Arn. 
(Pyrenopsis, Nyl. Porocyphus, Koerb.). 
It is far from easy to determine, or rather find, spores in such North 
American specimens of Synalissa § Pyrenopsis, as have come before me. 
And, at the best, the type of such spores cannot but be obscure. Ny- 
lander’s observation of something like bilocular spores in two species of 
his Pyrenopsis (Lich. Scand. p. 26, 288) is therefore interesting; and the 
further remark that in one of these instances the organs in question were 
1 Will be elsewhere described. Thallus dark brown, at length broken into 
areole-like masses, and the granules finally more or less coralloid; cellular tissue 
coarser than in S. polycocea, the reddish, exterior cells about 0,007-11™™- in diam- 
eter, and the interior, 0,018-25™™-, or now 0,033™™- by 0,023™™-; one to three col- 
logonidia in the cells. Spores very imperfectly seen, ovoid-ellipsoid, simple, nebu- 
lous, without colour, 0.009-11™™- long, and 0,006™™. wide; but probably occurring 
larger. Paraphyses indistinct. Filaments not wholly deficient in the thallus. 
Spermatia ellipsoid; sterigmas simple. 
2 Synalissa phylliscina (sp.nova) thallo granuloso tenui fusco-nigro; apotheciis 
globosis sub-clausis.. Spore in thecis lato-fusiformibus octone, ovoideo-ellipsoidec, 
simplices, fere incolores, longit. 0,009-15™™- crassit. 0,005-7™™; paraphysibus par- 
cis brevibus. —— External (reddish) cells 0,006-9"™- in diameter; the internal ones 
reaching 0,020-27™™- Collogonidia with the general features of those of Ompha- 
laria phyllisca (Phylliscum, Nyl.) but smaller. Spermatia acicular, bowed; on 
simple sterigmas. Reaction of hymenial gelatine with iodine vinous-red. 
3 Thallus with the aspect of S. symphorea, at least in the European specimens, 
attached at the centre, nodose-lobulate, made up of mostly solitary collogonidia 
which are scattered amidst conspicuous filaments. Apothecia unknown. Sper- 
mogones situated similarly to apothecia, containing filiform, bowed spermatia, 
upon simple sterigmas. Collogonidia 0.006-11™™- in diameter. 
