168 PROCEEDINGS OF THE AMERICAN ACADEMY 



perh., p. 22) from Newfoundland ; and no description of it is known 

 to me. 



Sticta Hallii, sp. nov. : tliallo coi-iaceo reticulato-celluloso snbtiliter 

 rimuloso-granulato sparsimqiie villosiusculo cinereo-glaucescente, laciniis 

 rotundatis subintegris, subtus venoso-costato tomentoso maculis pallidi- 

 oribus nudis notato ; apotheciis sparsis (latit. 2-3 millim.) sessilibus, 

 excipulo villoso integre marginato, disro rufo-fusco. Sporae naviculares, 

 biloculares, fnscae, loiigit. 0,023-36"'™-, cra^sit. 0,009-14"'™-. — Trunks, 

 Oregon, E. Hall, 1871. Of the stock of S. scrobicidata, and closely 

 approaching this species, from which it yet differs in its more or less 

 villous upper side, its veiny under side, its villous apothecia, and espe- 

 cially in its brown, always bilocular spores, which are not reconcilable 

 with those of the other. Some of the specimens show indications of 

 the peculiar sorediation of S. ^scrohiculata, — a feature characteristical 

 also in S. anihraspis, Ach., of the same region. The lichen differs from 

 the older species perhaps less in the thallus, than S. Oregana {Mihi in 

 Bull. Torr. Bot. Club, April, 1874) from S. piihnonaria ; but more 

 in the spores. It is dedicated to the discoverer, my friendly corre- 

 spondent, P^lihu Hall. 



Erioderma velligerum, sub-sp. nov. : thallo imbricato cinera- 

 scente, lobis adscendentibus rotundatis sinuato-incisis margine subcrispis 

 dense hirsutis, subtus sulphureo ; apotheciis (2-4 millim, latis) marginali- 

 bus extus hirsutis, disco fuscescente. SponB octonaj rotundato-ellipsoi- 

 dete, simplices, limbata;, longit. 0,009-1 G"""-, crassit. 0,008- 10™"'-, leviter 

 in thecis infuscatOB dein incolores. — Shores of the Straits of Magellan, 

 Mev.Dr. Thomas Hill (Hassler exp. 1872). Not well comparable with 

 such species as E. polycarpum and E. Wrightii, which exhibit the nor- 

 mal Peltigeriue frond, but differing from that exactly as some imbricated 

 and crisped forms of Peltigera mfescens. The hirsute upper surface and 

 sulphur-colored under side, as well as the habit of growth, distinguish 

 the lichen from what I have seen of Erioderma Chilense, but the last 

 is very near, and said by Montague to be also imbricate, as it has simi- 

 lar though more rounded spores. I cannot but still consider this little 

 group as belonging to the Peltigerei. 



Pannaria symptychia, sp. nov. : thallo foliaceo membranaceo-car- 

 tilagineo ca\spitoso-polyphyllo livido-fnscescente, lobis sinuato-repandis 

 flexuosis complicatis subtus nudis fuscis ; hypothallo obsoleto ; a|)0the- 

 ciis (latit. c. 1""") biatorinis sessilibus, margine tenui integerrimo fusco 

 discum convexum nigrum opacum cingente. Sporre octonte, ellipsoidefe, 

 simplices, incolores, longit. 0,009-16"'™-, crassit. 0,007-10™'"-, paraphysi- 

 bu.o incrassatulis distinctis. — On rocks (apparently) island of Juan Fer- 



