— 107 - 
Physcia (Schreb.) Th. Fr. 
P. ( Euphyscia ) pulverulenta (Schreb.) Nyl. var. muscigena (Whlnb.) 
Nyl. On mosses, West Dawson, no. 39, and Bonanza Creek, no. 38, both 
infertile. 
P. ( Euphyscia ) obscura (Ehrh.) Nyl. On rocks, Hunker Creek, no. 43, 
and West Dawson, no. 44, both infertile. 
P. obscura var. ulothrix (Ach.) Nyl. On mosses, Hunker Creek, no. 42, 
infertile. The receptacle hirsute beneath, and the whole plant very dark 
colored. 
Umbilicaria Hoffm. 
U. ( Gyrophora ) arctica Ach. U. proboscidea arctica Tucks. Syn. On 
rocks, “the Dome,” no. 48, fertile and characteristic. Not previously re- 
ported from the Alaskan region. 
U. ( Gyrophora ) anthracina (Wulf.) Schaer. var. reticulata Schaer. 
On rocks, “the Dome,” no. 47, fertile, the apothecia elevated. Not previ- 
ously reported from the region. 
U. ( Gyrophora ) hyperborea Hoffm. On rocks, “ the Dome,” no. 49, 
fertile. 
U. ( Gyrophora ) vellea (L.) Nyl. On rocks, “the Dome,” no. 50, infer- 
tile. Specimen poor and complicate-lobed. Only U. vellea tylorrhiza Nyl. 
previously recorded from the Alaskan district. 
Nephroma Ach. 
N. ( Eunephroma ) arcticum (L.) Fr. On earth, Bonanza Creek, no. 54, 
fertile. 
N. ( Nephromium ) expallidum Nyl. On earth, Hunker Creek, no. 55, 
fertile. 
N. ( Nephromiuiri) Helveticum Ach. On rocks, Hunker Creek, no. 56, 
fertile. Not previously reported from Alaskan district. 
N. {Nephromiuiri) laevigatum Ach. On rocks, Hunker Creek, no. 52, 
infertile. 
' N. laevigatum var. parile (Ach ) Nyl. On rocks, Bonanza Creek, no. 
53, infertile. 
Peltigera Willd. 
P .{Peltidea) venosa (L.) Hoffm. On earth, Hunker Creek, no. 117, 
fertile. 
P. {Peltidea) aphthosa (L.) Hoffm. On earth-, West Dawson, no. 118, 
infertile. 
P. {Eupeltigera) scutata (Dicks.) Leight. On earth, Hunker Creek, no. 
122, infertile, spongiose beneath and distinctly limbate-sorediate. Previously 
reported from Kotzebue Sound. 
P. {Eupeltigera) pulverulenta (Tayl.) Nyl. On’earth, Bonanza Creek 
no. 1 19, infertile. The cortex granulate. 
P. {Eupeltigera) rufescens (Neck.) Hoffm. On earth, Dawson, no. 121, 
and Hunker Creek, nos. 120 and 120a, the latter fertile. 
P. rufescens sub-sp. spuria (Ach.) Nyl. Syn. p, 325. On earth. Hunker 
Creek, no. 123, fertile. 
