OF GREAT BRITAIN. 415 



Syn :— Leight. in Ann. and Mag. N. Hist. Oct. 1856. Mudd Man. 250, 



Fig :— Leight. 1. c. t. 11. f. 6. 7. 8. 9. 10. 



Exs :— Leight. 224. Mudd 235. 



Geog. Distrib : — France. 



Bot. Pkov :— 2, 3.. .5, 6, 7...10...19. 



England:— Newton Wood ! Stogdale ! Oggeray Gill ! Cleveland. Mr. Mudd. 

 (1856.) Hickmore Fen Wood ; Pod's Wood, Messing. Essex. Mr. Varewne. 

 New Forest. Rev. J. M. Crmribie. Nesscliffe Hill ! Shropshire. 



Ireland : — Castlebernard ! Mr. Carroll, 



Wales :— Gwydir Woods ! Bettws-y-coed, Trefriw ! Beddgelert ! Knighton ! 

 Radnorshire. 



"Spores .003 in. long, by .001 in. broad." (Mudd.) Spores .014— .015 mm. 

 long, .004 — .005 mm. broad. 



Var. pineti, Korb. glauco-rufescent, very slightly leprose, unequal ; 

 ardettce reddish-black or black, minute, crowded, diformed, angular 

 or sub-stellate, plane ; spores 4-6, colourless, at length fuscescent, 

 obovate, 1 -septate, as in vinosa. 



On trees, holly, in sub-alpine localities, rare 



Syn :— Korb. S. L. G. 292. (1855.) Nyl. Scand. 261. 



Fig :— Hepp Sporen t. 64. f. 558. Grevillea 1. t. 4. f. 5. 



Exs :— Hepp 558. Arn. 243. Zw. 309. 



Geog. Distrib : — Germany, Scandinavia. 



Bot. Prov :— 6, 7...19...22...24, 25, 26. 



Ireland :— Glencar, Kerry ; Loughcooter, Galway ; Luggela co. Wicklow ; 

 Eagle's Nest, Killarney ; co. Cork ; Mr. Carroll. ClonmeL Mr. Wright. Kyle- 

 more ! Doughruagh ! co. Galway. Mr. Larbalestier. 



Wales :— Gwydir Woods ! Bettws-y-coed. Trefriw ! Beddgelert ! Builth ! 

 Capel Arthog ! Dolgelley ! 



Spores .016—20 mm. long, .007—8 mm. broad. Gelatma hymenea I 

 vinous-red." {Nyl.) Spores .013— .0165 mm. long, .006— .007 mm. broad. 

 This Arthonia may be readily distinguished from its congeners by a section of 

 the ardella turning vinous-red or purple in K. 



3. A. atrofuscella, Nyl. " Similar to A. pineti, Krb. but with 

 smaller spores. Spores .012 — 16 mm. long, .005 — 6 mm. broad." 

 (Nyl.) Spores .015 mm. long, .007 mm. broad. K renders hy- 

 menium dusky atro-fuscescent. 



On trees. 



Syn :— Nyl. in Flora 1875. p. 363. 

 Bot. Prov :— 26. 



Ireland : — Doughruagh Mountain ! Kylemore ! Galway. Mr. Larbalestier. 

 (1876.) 



4. A. aspersella, Leight. pale-yellowish, maeulari-effuse ; ardettce 

 black or nigro-fusaus, very minute, scattered, punctiform, linear or 

 angularirconfluent ; hymenium uutinged by K ; spores 8, colour- 

 less, obovate, 1-septate. 



On holly. 1872. 



Syn :— Leight. in Grevillea 1. 60. (1872.) 



Fig : — Grevillea 1. c. t. 4. f . 4. a. and b. 



Bot. Prov :— 7. 



Wales : — Gwydir Woods, Bettws-y-coed ! (1872.) Trefriw ! Capel Arthog 

 Dolgelley ! 



This lichen assimilates in general aspect with A. vinosa vwr. pineti, but in 

 that the ardellae are roundish and the hymenium is tinged red-purple with K ; 

 whilst in aspersella the ardellae are remarkable for a peculiar sharp angularity, 

 and the hymenium is untinged by K. Spores .014 mm. long, .0055 mm. broad 



5. A. sapineti, Nyl. virescent, macular, effuse ; ardellae nigro- 

 fuscous, very minute, punctiform or angulari-confluent ; hymenium 

 untinged by K ; spores 8, colourless, obovate, 1-septate. 



