358 DR. LINDSAY ON WEST-GREENLAND LICHENS. 
12. L. atro-brunnea, Ram. I have seen no Greenland specimens ; but in Nylander's 
Exs. the paraphyses are :0023” long, their tips indigo-blue; the sporidia irregular in 
form and size, simple, :00025” long and :00013” broad. us 
13. L. Fahliana, n. sp. Thallus with the characters of that of fusco-atra and atro- 
brunnea; and its sporidia are also simple, but their colour is constantly olive or brown. 
The hymenial gelatine gives a beautiful blue with iodine. The tips of the paraphyses 
are agglutinated and pale brown. The sporidia vary considerably in size, generally 
:00030” long and :00022" broad; their form generally oval or oval-oblong ; frequently 
granular in the young state; generally with double contour in maturity. They are very 
numerous and distinct, in which characters they contrast with the sporidia either of 
Jusco-atra or atro-brunnea. I name this lichen after the distinguished Danish botanist, 
J. Vahl, by whom the greater part of the Greenland lichens described in Fries’s ‘L. Arc- 
toi” were collected. 
14. L. Campsteriana, n. sp.—Atanakerdluk. Thallus resembling that of L. geogra- 
phica as to colour. It is, however, thicker, and more tartareous, its areole more 
pulviniform. The apothecia are black, convex, becoming sometimes subspherical ; immar- 
ginate, or having sometimes a spurious thalline border. They thus resemble the apo- 
thecia of Lecanora sulphurea, in being sometimes sublecanorine, though more properly 
or usually they are lecideine. Polytropa is another Lecanora, which, like sulphurea, has 
a better title to rank as a Lecidea, its apothecia being much more frequently immar- 
ginate and lecideine than possessing a conspicuous thalline exciple. The sporidia of 
Campsteriana are small, ellipsoid, simple, and colourless. 
Campsteriana possesses some of the characters of the following Lecidee, with which 
I have carefully compared it. But it differs sufficiently to induce me to give it separate 
rank, until at least it is fully examined in different conditions and stages of growth. 
(1.) Lecidea sulphurella, Th. Fries (L. Arct. p. 221), if i£ deserves specific rank. 
Campsteriana appears to agree more closely with this than with the species that follow ; 
but I have seen no specimen of Fries's plant. | 
(2.) Lecanora calcarea, Kudlesæt. Sporidia and apothecia the same ; but the colour 
and farinosity of the thallus constitute points of difference. 
(3.) Lecidea elata, Scher., Hepp's Exs. No. 250. Thallus not so green as that of 
Campsteriana; while the apothecia are generally flatter, and more frequently haveno exciple. 
(4.) L. viridi-atra, Mudd (Brit. Lich. p.205; E. Bot. t. 2030), not at all Hepp's No. 255. 
Thallus and apothecia as in Z. elata. 
(5.) L. Kochiana, Sch., Hepp's Exs. No. 239; and Lecanora sulphurea, Ach. 
The coincidence in name between the enterprising explorer of Vancouver Island and 
the collector of the Lichens described in the present memoir, on the one hand, and the 
late distinguished Director of the Botanical Department of the British Museum, on the 
other, forbids my attaching the name of Robert Brown to any of the new species now 
described, as not being a sufficiently distinctive designation*.  Desirous, nevertheless, of 
* The more especially seeing that various arctic lichen-collections were named by the late Robert Brown, F.R.S., 
e.g. those made during the discovery-voyages of Sir John Ross, Sir Edward Parry, and Dr. Scoresby. [ Vide my Paper 
on the “ Greenland Lichén-flora,” pp. 35 and 47.] to eT NES 
