78 Discomycetese, Arthoniacese, Arthotholiura. 



1. Arthothellum ruanldeum (Nyl.) Arn. Lich. n. 1078, Rehm Disc. 4759 

 p. 43S, Arthonia Nyl. — Ascomatibus in areis griseo-bruaneolis, 

 gregariis coufluendo rotundo-stellatis, 1 mm. lat., nigris; ascis 50- 

 60 ^ 2-5, octosporis ; sporidiis oblongo-ellipticis, 7-septato-murifor- 

 raibus, hyalinis, 15-18 5 7-9. 



Hab. in cortice juniore Alni, Fraxini, Coryli, Pini, Ili- 

 cis, in Germania, Helvetia, 



2. Arthotheilum ruanum (Mass.) Rehm Disc. p. 439, Arthonia Mass. 4770 

 Ric. p. 47. — Ascoraatibus in areis pallidis acervulatis, ramoso- 

 confluentibus, 0,1-0,2 mm. lat., nigris; acervulis 1-1,5 ram. lat. ; 

 ascis 36-40 ^ 21-25, octosporis ; sporidiis ellipsoideis, 5~7-septato- 

 nmriformibus, 15-18 ::s 6-7, hyalinis dein brunneolis, medio con- 

 strictis. 



Hab. in cortice Pinorurn, Quercus, Fraxini, Carpini, 

 Juglandis in Germaoia, Helvetia. 



3. Arthothellum subcembrinum (Anzi) Rehm Disc. p. 439, Arihonia 4771 

 Anzi Symb. p. 22. — Ascomatibus sparsis, puncfciformi-inaequali- 

 bus; ascis piriformibus, 6-8-sporis; sporidiis obovato-cuneatis, piu- 

 riseptato-muriformibus, 17-21^8-10, hyalinis. 



Uab. in cortice leviore Pini Cembrae in Vai Furva Ital. 

 bor. (Anzi). 



4. Arthoihelium Beltramlnianum Mass. Mem. Licli. pag. 115, Rehm 477^ 

 Disc. p. 440. — Ascomatibus in areis albis subrotundis gregariis, 



e rotundo stelliformibus, radiatim expansis, 0,2-1 . rara. lat. ; ascis 

 36-45 i; 21-24, octosporis; sporidiis oblongis, 7-septato-muriformi- 

 bus, hyalinis, 15-18^6-7. 



Hab. iu cortice Garpini et Juglaudis in Italia et Ger- 

 mania. 



5. Arthothelium spectabile (Fiot.) Mass. Ric pag. 54, Rehm Disc. An 

 p. 440, Arthonia Flot. — Ascomatibus in areis niveis amplis gre- 

 gariis, insequaliter ruguloso-ramosis, nigris, 0,2-3 mm. long. ; ascis 

 50-60 :i 50, 6-8-sporis; sporidiis ellipsoideis, 5-septato-muriformi- 

 bus, hyalinis, 25-30 c; 10-15. 



Hab. in cortice leviore Alni, Crataegi, Goryli, Quercus, 

 Fraxini in Gerraania, Helvetia. 



6. Arthothellum subastroideum Anzi Symb. p. 22, Rehm Disc. p. 441. 47/ 

 — Ascomatibus ia areis dealbatis gregariis, subrotundis, saepe ma- 

 culiformi-confertis, atris, 0,5 mra. lat. ; ascis 45-50:^36-38, octo- 

 sporis; sporidiis oblongo-ovoideis, 7-9-septato-munformibus, hya- 

 Unis v. flavidulis, 21-24^10-12. 



