89 



NEW BRITISH LICHENS. 



Communicated by the Rev. J. M. Crombie, F.L.S., &c. 



The following new species of British Lichens have been described 

 by Dr. Nylander in the " Flora," 1873, pp. 280 300. 



1. Lecanora fugiens. Nyl. — Thallns glaucescent, opaque, thin 

 or very thin, unequal, effuse; apothecia whitish flesh-coloured, 



minute, with entire white thalline margin; spores 8 nae, ellipsoid, 

 0,009-13 m.m. long, 0,005-G m.m. thick ; paraphyses slender; 

 hymeneal gelatine (especially the thecse) bluish and then tawny 

 wine-red with iodine. 



On dry rocks in the Island of Jersey (Larbalestier). This species 

 belongs to the section of L. piniperda, Krb., and has the spermatid 

 arcuate. 



2. Lecanora actaea. Nyl. — Thallns leaden-greyish, unequal, ri- 

 moso- diffract, moderate or thinnish, somewhat bluish and white, 

 fimbriated at the circumference ; apothecia blackish, slightly pro- 

 minent, at length convex, biatorine ; spores 8 nae, ellipsoid or sub- 

 fusiform, 1-septate, 0,012-14 m.m. long, 0,00045 m.m. thick; 

 epithecium dark-bluish ; paraphyses thickish, articulated; hymeneal 

 gelatine, bluish, and the thecre at length violet with iodine. 



On maritime rocks in the Island of Jersey (Larbalestier). A 

 peculiar species belonging to the section of Lecanora erysibe ( Ach.) 



3. Lecanora spodophseiza. Nyl. — Thallus greyish, moderate, 

 granuloso-verrucose, thinly white-fimbriated at the extreme cir- 

 cumference ; apothecia badio- reddish, somewhat plane, with sub- 

 entire, scarcely prominent thalline margin ; spores 8 nae, oblong 

 or fusiform i-oblong, simple, or often subspuriously 1-septate, vari- 

 able, 0,009-18 m.m. long, 0,004-6 m.m. thick ; epithecium faintly 

 brownish ; hymeneal gelatine at first slightly bluish, and then 

 wine-red with iodine. 



On maritime rocks in the Island of Jersey (Larbalestier). This 

 species has the appearance of Lecanora poliophcea or spodophwa, 

 but in reality belongs to the section of L. erysibe. The spermatia 

 are arcuate. 



4. Lecidea atropurpurascens. Nyl.— Somewhat similar to L. 

 atro- purpurea, Schaer, but differing amongst other characters in 

 having the hymeneal gelatine intensely and persistently bluish 

 with iodine. 



On aged oaks in the New Forest, near Ministeed (Crombie, 

 April, 1808). 



5. Lecidea subsphaeroides. Nyl— Thallus whitish, thin, areolato- 

 rimose, rugulose ; apothecia pale-reddish, margined, at length 

 convex, the margin excluded, moderate; spores 8 n«, ellipsoid, or 

 oblongo-ellipsoid, 1-septate, 0,014-17 m.m. long, 0,006-7 m.m. 

 thick ; paraphyses not discrete ; hymeneal gelatine bluish and the 

 thecaj violet with iodine. 



