24 NEW BRITISH LICHENS. 



spores 8 nje, colourless, ellipsoid, 0-010-12 m.m.long, 0'006-8 m.m. 

 thick ; epitliecium and hypothecium brown, parapbyses moderate ; 

 hymenial gelatine intensely bluish with iodine. 



On schistose rocks of Stronaclachan in Killin (Crombie). Allied 

 to Z/. deparcula, Nyl. 



11. Iiecidea confusior. Nyl. — Thallus dark-greyish, thin, rimoso- 

 areolate, indeterminate ; apothecia black, convex, immarginate, 

 when young plane, obsoletely margined, white within ; spores 8 nae, 

 ellipsoid or oblong, simple, 0-010-17 m.m. long, 0-004-6 m.m. 

 thick; parapbyses thickish, not very well discrete, blackish at the 

 apices, hypothecium colourless ; hymenial gelatine intensely bluish 

 and then wine-reddish with iodine. 



On micaceous rocks, Craig Tulloch, Blair Athol (Crombie). 

 Allied to L. confusula, Nyl., but differing in character of thallus 

 and spores. 



12. Ftychographa xylogxaphoides. i\^yZ.— Thallus whitish, ma-" 

 cular, or nearly obsolete, apothecia black, lanceolate, somewhat 

 prominent, above plane, epithecium usually 1 or 3 plicated, margined, 

 within concolorous ; spores 8 use, colourless, ellipsoid, simple, 

 0-011-14 m.m. long, 0-006-7 m.m. thick, epitliecium nearly colour- 

 less, hypothecium with the peritheciam black; hymenial gelatine 

 wine- red with iodine. 



On decorticated mountain-ash on Craig Calliach, Killin (Crom- 

 bie). A new genus and species, differing in the arrangement of 

 the hymenia, which are 2 or 4 longitudinal in each apothecium, 

 from Xylographa and all the other Graphidei. 



In addition to the above, the following nSw species may also be 

 mentioned, viz. : — 



13. Endococcus tiiphractoides. Njl. in litt. — Apothecia minute, 

 hemispherical, black, perithecium entire, spores 8 na3, oblongo- 

 fusiform, 3-septate, colourless or pale-brownish, 0-014-18 m.m. 

 long, 0-006-7 m.m. thick. 



On schistose boulders, Craig Tulloch, Blair Athole (Crombie). 

 Parasitic on dealbated portions of thallus of Lecidea Scotinodes^ 

 Nyl. 



LICHEN FROM BEN LAWERS. 



By Dr. Stirton. 



I.ecidea subretxusa. Strn. — Thallus albidus vix ullus ; apothecia 

 nigra mediocria convexa immarginata ; sporje 8 nge incolores fusi- 

 formes, 3-9 (plerumque 7) septate, •045-*06 X •01--012 m.m. ; 

 parapbyses non bene discrette fere conglutinatae, apicibus coeru- 

 lescentibus ; hypothecium fusconigrum vel potius fusco-rufum. 



Supra Weissiam compactam. Ben Lawers. 1871. 



Affinis Lecidea sabuletorum. Fkl. — The reaction with iodine 

 on the hymenial gelatine has not been ascertained, and as there 



