108 
NEW BRITISH LICHENS. 
with the pvreninra entire, black, minute, above somewhat convexly 
p ominent ; spores 8 nae., brown, ellipsoid, eS septate, 0,018-23 
mm. long, 0,007-0,010 mm. thick, paraphysesmodei-ate ; liymeneal 
gelatine not coloured with iodine. On mieaceo-schistose rocks, 
Connemara, Ireland (Larbalestier). This belongs to the section of 
V. thelena. 
In addition to the above, other two new varieties are also 
described by Nylander, Z.c., pp. 577-8, viz. : — 
liecanoxa erysibe, var. sincerior. Nyl. — Thallus pale greyish or 
snbochraceo-whitish, subgranulated, areolato-rimose, apothecia 
pale-brownish, lecanorine. On maritime rocks, Guernsey, and 
Lough Inagh, Galway (Larbalestier) : formerly gathered in the E. 
Pyrenees (Nylander). 
Lecidea scabra, Tayl. f. meiococca. 'Syl . — Apothecia reddish or 
somewhat pale. On maritime rocks. Bay of Nigg, Kincardineshire 
(Crombie) ; Letter, Galway (Larbalestier). This appeared in my 
Eimm. p. 77 s.n. L. ( 2 )arasema) latypea f. coccoHes. 
NOTE ON THE BEITISH SPECIES OF PTERYGIUM. 
By the Rev. J. M. Crombie, F.L.S. 
In my Revision of the British Collemacei*^ in “ Jottrn. Bot.” iii., ]). 
331 et seq., I stated in tlie introductory observations that probably 
some species of Pterygium would yet be detected amongst the 
Scottish Grampians. At that time I was not aware that the speci- 
men recorded in “ Gievillea'’ i., p. 171, ?,.vi.Pahnariatriseptata, Nyh, 
from Craig Tulloch, Blair A thole, w^as in reality referable to the 
present genus. In Stizenberger’s “Lich. Hyperb.,” however, p. 25 
(note), it is, on the autlioiity of Nylander, to be regarded merely 
as a synonym of Pterygium pannaiiellvm ( == Lecothecium 
rosii/aus, Th. Fr.) Another and a new species, not yet described, 
was detected by me in the North of Argyleshiie, in August, 
1876, so that the British species of Pterygium now stand as 
follows : — 
1. Pt. pannariellum. Kyi. — On limestone rocks, Craig Tulloch, 
Blair A thole, Perthshire ; very rare, and only a single small 
specimen found in fruit. 
2. Pt. Lismorense. Cromb. sp. n. — Thallus nigricans, subfur- 
furaceus, tenuiter vel obsolete radiosus, varie confluens; apothecia 
* These, in various important respects, again stand much in need of re- 
revision, if I may use the term; e.g. Collema lichinodeum is now referred by 
Nylander to a distinct genus, Schizoma Nyl. 
