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(Lich. Suec. 0. 25) inhabiting the bark and dead wood of Pines, &c., was 
detected in Greenland by J. Vahl (Th. Fr. i. ¢. p. 217) and I have 
observed it accompanying other lichens (on Libocedrus) from California 
(Mr. Bolander).——L. melancheima, Tuck. Syn. N. Eng. p. 68, & Lich. 
ers. 0. 133 (ZL. sabuletorum v. euphorea, Fr. L. E. p. 340, & Lich. Suec. n. 
154; non Floerk. JZ. euphoroides, Nyl. Lich. Scand. p. 244) is common 
throughout New England, but not known to me from any locality south- 
ward. —— L. Diapensi@, Th. Fr. 1. ¢., is also to be credited to our alpine 
districts; but the White Mountain lichen, which is frequent on dead sods 
of Diapensia, differs from the description, and from my European speci- 
mens, in having often larger, at length flexuous, and not rarely brownish 
apothecia; agreeing however with the others internally. ——L. myrme- 
cina, Fr., has occurred, rarely, on rails, at Ipswich, Mass. (Oakes) and, 
on White Cedar, at New Bedford (Mr. Willey). 
The central group of saxicoline, mostly graniticoline Lecidee is well 
represented throughout the Appalachian chain, and was here first studied, 
in North Carolina, by Schweinitz. But his herbarium is the only evidence 
of this; and a vast deal remains to be done before the limits even of our 
better known forms can be other than obscure.——L. spilota, Fr. (Lich. 
Suec. n. 409) is not rare on trap and other rocks on the coast of New 
England, and has also occurred (on schist) in Vermont (Mr. Frost) at Lake 
Superior (Prof. Agassiz) and in California (Mr. Bolander). —— L. poly- 
carpa, Floerk. (Nyl. in Fellm. Lich. Arct. n. 189) is only known to me in 
specimens from alpine rocks in the White Mountains, which agree with 
the cited ones, and in habit with Z. confluens ; and from Labrador (Herb. 
Krempelh.).——L. auriculata, Th. Fr. Lich. Arct. p. 213, inhabiting 
Arctic Europe, and also Greenland, is unknown to me. —— L. amylacea, 
Ach., Nyl. (Z. elata, Scher.) is another inhabitant of Greenland (J. Vahl 
e Th. Fr. 1. c.) which is as yet undetected elsewhere within our limits. 
—— L. aglea, Sommerf. (Herb. Krempelh.) occurs in the alpine region of 
the White Mountains. ——L. Armeniaca (DC.) Fr., is only as yet known 
as North American, from Greenland (J. Vahl e Th. Fr. J. ¢.) but there 
seems to be no reason why this fine species should not reach (in alpine 
districts) much more southern latitudes. ——L. atro-brunnea (DC.) Scher. 
(Lich. Helv. 144. Herb. Th. Fr.) an inhabitant of Greenland (J. Vahl, e 
Th. Fr. 7. c.) and of the alpme region of the Rocky Mountains (Dr. 
Parry) as of the Pacific coast (H. Mann; Bolander) is also to be looked 
for on the alpine rocks of New England. The nearly akin L. fusco-atra, 
responsible for an opinion which he has expressly disclaimed. -Acharius deter- 
mined Gyalecta abstrusa (Wallr.) Arn., as merely a bark-form (,3 truncigena) of 
G. foveolaris, and it was indifferent whether he distinguished by name such form 
or not; but Wallroth, if the synonymy (Koerb. Syst.) be right, was first to say 
that this lichen was not a member of G. foveolaris, but a distinct species, and the 
responsibility or credit of the judgment belongs to him. 
