of some Lichens. 249 



Forma vagans, Mer. 

 Meresckkovsky, Nachtrag zur Flechtenl. Umgeg. Eevals, Kazan, 1913. 

 Spec. orig. (numerosissim.) in lierb. meo Kazaiii. 



Cetran'a tenuissima, forma stepposa, M"r. 



Mereschkovsky, Contrib. fl. lich. Criiu^e, Aun. d. sc. nat. Botanique, 

 1921. 



Thallus liberus, oj^icicus, laciniis paullulum minus attenuatis. 



Spec. orig. (iiiimerosissim.) in herb, meo Kazani. 

 Kossia meiidio-oiieiitalis, Tauria. 



Forma vagans^ Mer. 

 Merescbkovsky, Nachtrag zur Flecbtenl. Uingeg. Revals, Kazan, 1913. 

 Thallo libero, nitido, sphaeroideo-rotuudato, ramulis circa ut in typo. 



Spec. orig. (nnmeros.) in lierb. meo Kazani. 

 Estlilaiidia, Reval. 



Parmelia camtschadalis, forma amjyh'ata, Mer. 



Mereschkovsky, Addit. Lichenogr. Ross, ii., in Annuaire du Conservat. 

 et .Tard. but. d. Geneve, vol. xxi. 1921. 



Laciniis latioribus, lanceolatis ; apotheciis minoribus, circiter 

 1-5 millim. latis, ad superficiem thalli disseminutis. 



Spec. orig. (1) in herb. Conservat. bot. Genev?e, (2) in herb. 

 Brit. Mus. 

 Camtschatka. 



Forma siibnuda, Mer. 



Mereschkovsky, I. c. 



Thallus laciniis abbreviatis, subtus glabris, rhizinis destitutis vel 

 rarissime brevissimis, ad margines Mnc inde parce rhizinis ornatis. 



Spec. orig. in herb. Conservat. botan. Genevse. 

 Camtschatka. 



Parmelia conspurcata, forma subdispersa, Mer. 



Mereschkovsky, Sched. ad Lich. tic. ex9. (no. 82), in Annuaire du 

 Conservat. et Jard. bot. d. Geneve, vol. xxi. 1919, p. 200. 



Thallus paullulum laetior, castaneus, e lobis subdispersis, rosulas 

 hand vel raro formantibus, compositus. CaCI.^O^-j-. 



