327 



89 (a). L. polytropa (Ehrh.). 



On rocks, ralher coninion (R., !). — In »SkaiKiselnngcn al Tliorshavn 

 it occurs with large tuberciilale ajjothecia (!), probahly var. conglobata 

 (Sommerf.). The form inlricala (Schrad.) is found on several of the 

 islands (!"). 



90 (b). L. sulphurea (Hoffm.). 



On rocks. Nolso [}.); Sando: Grothiisvatn (!); Skuo (H.j; Stronio: 

 Kirkebo (R., !), Thorshavn (R.), Kirkebofjæhl (!); Videro: MaHnsfjæhl (!); 

 Oster 6: Næs (!). 



The normal thailus sometimes appears dealhatcd and as if it 

 \vere worn. 



91. L. frustulosa (Dicks.). 



On rocks. Sando: Sandsvatn. — It does not diller from Arn. 

 Exs. 1162. 



92. L oculata (Dicks.). 



On rotten twigs on the ground, sterile. Sando: Skopen (!) ; Svind (!) ; 

 Videro: Malinsfjæld (!i. 



93. L badia (Pers.). 



On rocks. Bord 6: Klakken (!); Stromo: Lejnumvatn (!); Videro: 

 Viderejde (!); Ostero: Toftevatn (!,; Vaago: Sorvaagsvatn (!;. 



The facies is that of L. atriseda, but the spores those of L. badia. 



94. L. cyrtella (Ach.), L. erysibe f. albariella Nyl., Rostr. »Fær- 

 oernes Flora« == f. saxicola cyrtellae. 



On rocks. Sando: Grothusvatn (!); Stromo: Thorshavn (R.); on 

 trees at Thorshavn (R.\ 



95. L. aipospila Wahlenb. 

 Sporae, 1-sept., 7 — 12 fx. 

 Sando: Sandsvatn (!). 



96 (a). L. tartarea (L.) et f. grandinosa Ach. 



On rocks and sometimes over mosses; very common (R., !). 



97 (b). L. parella (L.). 



On rocks only (R., !). The most common of the two, provided 

 the deciding character be absence of reaction in the margin on 

 treatment with hypochlorite of lime, but if the deciding character 

 be nudity of the disk in the apothecia, then tartarea is the more 

 common. 



98 (a). L. cinerea (L.). 



On rocks. Stromo: Oreenge (!); Sjdero: Famievatn (!,. The 

 specimen from Famievatn does not redden when treated with hj'drate 

 of potash excepl about the apothecia. 



