48 BOTANY OF THE VOYAGE OF H.M.S. HERALD. 
288. Peltidea canina, Aeh.j Licli. Univ. p. 517. Norton Sound; Kotzebue Sound, among 
Mosses, Vaccinia, etc. 
289. Veltihea poly dacty la, var. scutata, Fries, Lichen. Europ. p. 47, sub Peltigera. Kotzebue 
Sound j vrith Mosses and leaves of Dry as octopetala and Betula nana. 
I had named tbia P. TiorizontaJis in ' Hooker's .Tournal of Botany,' not mthout some hesitation, as the 
upothueia "ucre inclined to be rcvolute ; on one of the specimens which I have since examined they are most 
decidedly so. The present form is very different in general aspect from the small P. scutata of Eng. Bot. 
with pulverulent margins ; indeed, it seems to diiFer in nothing material from P. horizontalis, except in 
hft^ang its apothecia at length revolute, and erect. Wahlenberg and Acharius, at one time, included it 
under that species. See Fries, I. c. 
290. Peltidea aphthosa, Acb., Lich. Univ. p. 516. Kotzebue Soundj with Hypna, Sphagna, etc. 
For some good remarks on the distribution of this genus, see Hook. fil. Fl. xintarct., which Mr. B. 
Seemaun's discoveries have somewhat qualified. P. horizontalis, I would add, has been found by Drum- 
mond in Arctic America. Mr. Seemann finds aU the species of this genus fertile. 
291. SviCT A pulmo?iac€a, Acb., Lich. Univ. p. 449. Kotzebue Sound; among Mosses and Wil- 
low-leaves; barren. 
The specimens are rather small, neatly crisped, and pale ferruginous below ; approaching the form 
called S. linita. One of the few Arctic species of this genus ; it does not appear to occur in the Antarctic 
regions, where so many Stictw are found ; but it is widely extended over the extra-tropical parts of the 
Northern hemisphere, and occurs, in an altered form (•S'. retigera, Ach.) in and about the Tropics. It would 
seem to have attained its southern limit in the Mauritius and Bourbon. 
292. Pakmelia saxailVis, Ach., Meth. Lich. p. 204. Kotzebue Sound ; on rocks; barren. 
Thallus having i^^idiophorous processes; lobes short and broad ; soredia, on some specimens, blue, confluent. 
293. Pakmelia parietina, Ach., Mcth. Lich. p. 213. Kotzebue Sound; scattered over some 
specimens of the preceding species ; barren. 
This Lichen is dispersed over tlio temperate and frigid zones of both hemispheres ; in the Antarctic 
region it has only as yet been found in an imperfect state {Lecanora citrina, Ach.). A specimen in my 
herbarium is marked " Surinam," but there is possibly an error respecting the habitat. 
294. Parmelia pallescens, var. Upsaliensis, Fries, Lich. Europ. p. 132. Kotzebue Sound; 
on the root of some grassy plant ; fertile. 
295. Parmelia tartarea, var. frigida, Fries, Lich. Europ. p. 134. Kotzebue Sound, covering 
the surface of a Moss, -which it has destroyed ; fertile. 
This and the preceding species are sometimes very difficult to distinguish ; one or both of them 
reappear in the temperate and frigid regions of the south. A barren Lichen from Kotzebue Sound appears 
to belong to P. oculata, Fries (Eng. Bot. t. 1833). 
296. Stereocaulox tomentosum? Fries, Sched. Crit. vol. iii. p. 20. Kotzebue Sound; growing 
loosely over masses of Jungermannia, mingled mtb Mosses ^and leaves of Vaccinia, also on sandy 
ground among Hypna. 
The absence of fruit renders the determination somewhat doubtful in so difficult a genus. S. tomentosum 
affects the more northern and alpine parts of Europe and America, and may probably be found elsewhere, 
since several species of Stereocauhn have a very wide range. 
