3*0 



tunda, elliptica, elongata et flexuosa, simplicia I. tridentata e. s. p.; /'/. nivalis 

 aunt paullo majora et magis congesta conglomerataque. 



Subfam. 2. Arthontei. 



Apothecia maculaeformia , radiato-stellata 1. rotundata , immarginata ; pa- 

 raphyses in raassam grumoso-floccosam mutatae. 



63. Arthonia Ach. emend. 



Th, ill i is crustaceus, uniformis, vulgo hypophloeodes; apothecia macu- 

 laeformia, primitus aperta; sporae plus minus cuneato-oblongae, tetrablastae , 

 incoloratae. 



1. A. radiata (Pers.): crusta primuin hypophloeode, dein denudata, 

 tenuiter leprosa, albido-cinerascente 1. glaucescenti-olivacea ; apotheciis inna- 

 tis, ex orbiculari angulosis, substellatim radiatis, atris, planis tumidulisve. 



Syn. Arthonia radiata Ach. Univ. p. 144. 



Opegrapha astroidea Wnbg. Lapp. p. 467, Smrft. Suppl. p. 142. 

 Arthonia Ach. Syn. p. 6. 



Opegrapha atra * macularis F r. L. E. p. 367. 



Opegrapha atra x n Schaer. Enum. p. 154. 



Arthonia vulgaris Mass. Rich. p. 48, Koerb. Syst. p. 290. 



Exs. L. Su. n. 24. Schaer. n. 16, 517. 



In cortice AIni incanae et parcius Sorbi aucupariae Nordlandiae au- 

 stralis frequenter (Smrft.), Finmarkiae orientalis rarius ex. gr. ad Polmak 

 (Wnbg.). 



Asci pyriformi-inflati; sporae senae I. octonae, cuneato-oblongae, utrin- 

 que obtusae, tetrablastae, luteolo-hyalinae, 0,oi6 18 mm. longae et 0,005 6 mm. 

 latae. 



2. A. punctiformis (Ach.): crusta hypophloeode; apotheciis minutis, 

 subimmersis, sparsis, subrotundo-difTormibus, atris, planiusculis. 



Syn. Arthonia punctiformis Ach. Univ. p. 141, Syn. p. 4, Koerb. 

 Syst. p. 293. Opegrapha Smrft. Suppl. p. 141. 



Arthonia atomaria Mass. Rich. p. 50. 



In cortice laevi ramorum Populi per Nordlandiam Saltensem (Smrft.). 



Asci pyriformi-inflati; sporae senae, tetrablastae, cuneato-oblongae , utrin- 

 que obtusae, luteolo-hyalinae, O,OH 10 mm. longae et 0,oo7 mm. latae. "Para- 

 physes capillares", de quibus mentionem facit Cel. Massalongo (I. c.), non adsunt. 



3. A. tralinella n. sp.: crusta hypophloeode; apotheciis minutis, su- 

 perficialibus, sparsis, rotundatis, nigris 1. fusconigris, convexis. 



