12 OTTO V. DARBISHIRE. [SEC. ARCT. EXP, FRAM 
tundatis, hyalinae, 15—20 x 7—10 mi. magnae. Spermogonia non visa. 
Habitat ad saxa, terram nudam et supra muscos Americae Arcticae, 
Notes: The new plant before us is very striking in appearance, 
and I think there can be no doubt that it is nearly allied to Placodium 
elegans, thus it resembles “Lecanora elegans (Acu.) f. muscicola, in 
H. Losxa, Lichenes Regni Hungarici Exsiccati. Fasciculus 3. (1882). 
n. 120.” But the latter has smaller spores (up to 14 mi. in length only) 
and the margin of the apothecia is more marked. Our new species 
often becomes almost fruticulose. Portions of the thallus stand up like 
the upright podetia of Dactylina arctica. But they are much smaller, 
about 1 cm. in height, and they are always dorsiventral in structure. 
Apothecia seem to be rare, some specimens being quite devoid of such, 
The complete absence of rhizines at once separates this species from 
any kind of Xanthoria. 
Aspicilia lesleyana. (Tab. 2, fig. 2). 
Diagnosis: Crusta tenuis vel crassiuscula, albo-cinerascens aut 
dilute roseola, rimoso-areolata vel rimoso-diffracta, margine quasi effi- 
gurato, frequenter non-contigua, hypothallo nigro vell pallido. Apothecia 
ad 1 mm. lata, primum immersa, urceolata, dein emersa, semper mat- 
gine dislincto cincta, atra, pruinosa; epithecium nigrum; sporae octonae, 
hyalinae, 15 & 7.5 mi. magnae. Habitat ad saxa. 
Notes: The species of Aspicilia are common enough in the 
“Fram” -material, but they have given me a great deal of trouble. I consider 
however this to be a new species, though not unlike Aspicilia calcarea, 
(L.) Smrrr. The latter however has fewer, but larger spores in its asci. 
The thallus of our new species is distinctly areolate and near the mar- 
gin it breaks up almost into long thin laciniae, still distinctly areolate. 
The thallus often consists of only one fertile wart. The hypothallus is 
as often clearly marked as not present. 
Aspicilia nikrapensis. (Tab. 2, fig. 3). 
Diagnosis: Crusta tenuis aut crassiuscula, tartarea, albo-ciner- 
ascens, conligua, centro inter apothecia matura distincte rimoso-areolata, 
margine fenui, quasi effigurato, hypothallo nigro aut nullo distincto. 
Apothecia primum immersa, demum emersa, disco planiusculo, pruinoso, 
margine distincto instructa; sporae octonae, 16—20  7—8 mi. magnae. 
Habitat ad saxa. 
